Respiratory Medicines: Bronchodilators, Steroids, Oxygen and Emergency Care

Why this topic matters in emergency medical care

Respiratory medicines can rapidly open narrowed airways, reduce inflammation, reverse anaphylaxis, treat infection, relieve pulmonary oedema or support ventilation. They can also cause tachyarrhythmia, hypokalaemia, hypercapnia, adrenal suppression or delayed recognition of a failing airway. EMT students therefore need more than a list of inhalers: they must understand the mechanism, delivery device, dose safety, oxygen target and reassessment plan.

This detailed lesson is for supervised learning and revision. Apply current Uganda Ministry of Health guidance, facility protocols, prescriber instructions, product information and age-specific emergency algorithms.

Learning outcomes

Describe airway, bronchial smooth-muscle, alveolar and pulmonary vascular targets of respiratory medicines.
Classify bronchodilators, inhaled/systemic corticosteroids, leukotriene modifiers, mucolytics, antibiotics, diuretics, pulmonary vasodilators and oxygen therapies.
Recognise and initially treat acute asthma, COPD exacerbation, anaphylaxis, pulmonary oedema, respiratory infection and opioid-related hypoventilation.
Choose an appropriate route and delivery system: inhaler, spacer, nebuliser, oral, intramuscular, intravenous or oxygen device.
Monitor response using work of breathing, respiratory rate, wheeze or silent chest, peak flow when appropriate, SpO2, mental status and blood gases.
Identify adverse effects, contraindications, interactions, special-population considerations and escalation triggers.

1. Respiratory physiology and medicine targets

Ventilation moves air to the alveoli; perfusion brings blood for gas exchange; diffusion transfers oxygen and carbon dioxide across the alveolar–capillary membrane. Airway resistance, lung compliance, respiratory muscle effort, haemoglobin and cardiac output all influence oxygen delivery. Respiratory medicines may relax bronchial smooth muscle, reduce airway inflammation, thin secretions, remove fluid, treat infection, reverse bronchospasm or support oxygenation.

Target	Physiological problem	Medicine examples	Emergency relevance
β2-adrenergic receptors	Bronchial smooth-muscle constriction	Salbutamol, terbutaline, formoterol	Rapid bronchodilation; high doses may cause tremor, tachycardia and hypokalaemia.
Muscarinic receptors	Vagal bronchoconstriction and mucus secretion	Ipratropium, tiotropium, glycopyrronium	Useful in COPD and severe asthma; dry mouth, urinary retention and glaucoma risk.
Airway inflammation	Eosinophilic or neutrophilic inflammation and mucosal oedema	Inhaled corticosteroids, prednisolone, hydrocortisone	Reduces exacerbation severity but onset is slower than a rescue bronchodilator.
Leukotriene pathway	Bronchoconstriction, oedema and mucus	Montelukast	Preventive role; not a substitute for immediate rescue treatment.
Alveolar fluid	Pulmonary oedema and impaired diffusion	Furosemide, nitrates, vasodilators	Relieves congestion when cardiac or fluid overload is responsible; monitor BP and renal function.
Blood oxygenation	Hypoxaemia	Controlled oxygen, high-flow oxygen, CPAP/BiPAP	Target saturation depends on condition; excessive oxygen can worsen hypercapnia in susceptible COPD patients.

2. Practical classification of respiratory medicines

Group	Examples	Main role	Critical caution
Short-acting β2 agonists	Salbutamol/albuterol, terbutaline	Rapid relief of bronchospasm	Tachycardia, tremor, hypokalaemia and lactic acidosis in high-dose therapy
Long-acting β2 agonists	Formoterol, salmeterol, indacaterol	Maintenance bronchodilation	Not all LABAs are suitable as sole asthma therapy; follow prescribed combinations.
Antimuscarinics	Ipratropium, tiotropium, glycopyrronium	Bronchodilation, especially COPD	Dry mouth, blurred vision, urinary retention and narrow-angle glaucoma caution
Inhaled corticosteroids	Budesonide, beclometasone, fluticasone	Control airway inflammation and prevent exacerbations	Oral candidiasis, dysphonia and systemic effects at high dose; rinse mouth.
Systemic corticosteroids	Prednisolone, hydrocortisone, methylprednisolone	Moderate/severe exacerbations and inflammatory emergencies	Hyperglycaemia, infection risk, mood effects and adrenal suppression
Methylxanthines	Theophylline, aminophylline	Limited specialist role	Narrow therapeutic window, arrhythmias, vomiting and seizures
Mucolytics	Acetylcysteine, carbocisteine	Reduce mucus viscosity in selected chronic disease	Bronchospasm or nausea; not a substitute for airway clearance.
Antibiotics	Amoxicillin, doxycycline, macrolides	Bacterial respiratory infection or selected COPD exacerbations	Do not use routinely for viral illness; allergy, QT, resistance and renal dosing matter.
Oxygen/ventilatory support	Controlled oxygen, high-flow oxygen, CPAP/BiPAP	Correct hypoxaemia or reduce work of breathing	Oxygen is a drug: prescribe target, device, flow and reassessment.

3. Inhaler devices and administration technique

Device	Technique essentials	Common error
Pressurised metered-dose inhaler	Shake, exhale away, seal lips, press once while inhaling slowly and deeply, hold breath and repeat after the interval.	Pressing before inhaling, inhaling too fast or failing to shake
Spacer chamber	Attach inhaler, release one puff at a time, inhale slowly or take several tidal breaths; use a mask if needed.	Multiple puffs into the chamber or poor mask seal
Dry-powder inhaler	Load dose, exhale away, inhale rapidly and deeply, hold breath; keep device dry.	Using a slow inhalation or exhaling into the device
Nebuliser	Use prescribed drug/diluent, suitable mask or mouthpiece, upright position and specified oxygen/air flow.	Delivering nebulisation to a tiring patient without preparing escalation.

“BREATHE” inhaler check

Breathe out first · Right device and dose · Exhale away from powder · Actuate once · Take the correct inhalation · Hold breath · Evaluate response and rinse after steroid.

4. β2-agonist bronchodilators

β2 agonists activate airway smooth-muscle receptors, increase cyclic AMP and produce bronchodilation. Salbutamol is the common short-acting rescue medicine; formoterol has a rapid onset and is used in specific maintenance-and-reliever regimens. A patient who needs repeated rescue doses may be deteriorating even if wheeze temporarily improves.

Medicine	Onset/role	Adverse effects	Monitoring and teaching
Salbutamol	Rapid relief of bronchospasm by inhaler, spacer or nebuliser	Tremor, tachycardia, palpitations, hypokalaemia and headache	Count doses, reassess work of breathing and pulse; frequent nebulisation requires senior review.
Terbutaline	Short-acting bronchodilator; inhaled or systemic protocols vary	Similar β2 effects; systemic route increases adverse effects	Use the authorised route and concentration; consider ECG and potassium in severe attacks.
Formoterol	Rapid-onset long-acting bronchodilator in selected combination inhalers	Tremor, tachycardia, cramps	Do not assume every LABA is a rescue drug; check the actual inhaler regimen.
Indacaterol/salmeterol	Long-acting maintenance bronchodilation	Palpitations, tremor and paradoxical bronchospasm	Not for rapid rescue unless the product specifically indicates it.

4.1 β2-agonist toxicity

High-dose nebulised salbutamol may cause a metabolic lactic acidosis that increases tachypnoea; do not interpret every rapid breath as worsening bronchospasm.
β2 stimulation drives potassium into cells, so severe attacks or repeated treatments can produce hypokalaemia and arrhythmia.
Chest pain, marked tachycardia, syncope or new arrhythmia requires ECG and escalation rather than automatic repeat dosing.
Paradoxical bronchospasm after an inhaled product is rare but serious; stop the suspected product and call for help.

5. Antimuscarinic bronchodilators

Ipratropium and related medicines block muscarinic receptors in airway smooth muscle, reducing vagal bronchoconstriction and mucus secretion. They are especially valuable in COPD exacerbations and are often combined with a β2 agonist in severe asthma.

Medicine	Role	Safety points
Ipratropium	Short-acting inhaled bronchodilator for COPD and severe asthma	Dry mouth, blurred vision, urinary retention; avoid spray into eyes and use caution in narrow-angle glaucoma.
Tiotropium	Once-daily maintenance bronchodilator	Not an acute rescue medicine; monitor anticholinergic effects.
Glycopyrronium/aclidinium	Long-acting COPD bronchodilation	Device technique and regular use matter; do not duplicate long-acting antimuscarinics.

6. Inhaled and systemic corticosteroids

Corticosteroids reduce airway inflammation, mucosal oedema and cytokine activity. Inhaled corticosteroids prevent exacerbations and improve asthma control, but they are not a substitute for rapid bronchodilation during a severe attack. Systemic corticosteroids are used early in moderate or severe exacerbations according to protocol.

Class	Examples	Clinical role	Adverse effects
Inhaled corticosteroids	Budesonide, beclometasone, fluticasone	Asthma controller therapy; selected COPD combinations	Oral thrush, dysphonia, bruising and systemic effects at high dose; rinse mouth.
Oral corticosteroids	Prednisolone	Acute asthma or COPD exacerbation when prescribed	Hyperglycaemia, mood change, insomnia, infection risk and gastric irritation.
IV/IM corticosteroids	Hydrocortisone, methylprednisolone	Unable to take oral therapy, severe exacerbation or adrenal support	Hyperglycaemia, fluid retention and delayed infection recognition.

7. Acute asthma exacerbation

Asthma involves variable airway narrowing, inflammation and mucus. Severe or life-threatening attacks may present with inability to speak, exhaustion, cyanosis, altered consciousness, silent chest, poor respiratory effort or a normalising/falling carbon dioxide despite severe distress. Wheeze disappearing is not always improvement: very little air movement may produce no sound.

Severity clue	What to look for	Medicine/support implication
Moderate exacerbation	Increased symptoms, wheeze, increased work of breathing but preserved speech and alertness	Repeated inhaled SABA through spacer or nebuliser, early steroid and reassessment.
Severe exacerbation	Marked tachypnoea, tachycardia, difficulty speaking, accessory-muscle use, low peak flow	Continuous monitoring, repeated SABA plus ipratropium and systemic steroid; urgent transport.
Life-threatening	Silent chest, exhaustion, confusion, cyanosis, poor respiratory effort or impending arrest	Call advanced airway/critical-care help, high-concentration oxygen for hypoxaemia and prepare escalation including IV magnesium or ventilation under protocol.

7.1 EMT sequence

Perform ABCDE, sit the patient upright, minimise exertion and obtain a focused trigger/medicine history.
Measure SpO2, respiratory rate, pulse, blood pressure, mental state and peak flow when the patient can perform it safely.
Give rapid inhaled bronchodilator via the best available device; severe attacks often need nebulised SABA plus ipratropium.
Give systemic corticosteroid early according to age, route and local protocol; do not delay transfer while waiting for full response.
Reassess speech, work of breathing, air entry, pulse, SpO2, fatigue and mental status after each treatment.
Arrange urgent transport; worsening fatigue, silent chest, altered consciousness, rising CO2 or poor response requires advanced airway planning.

8. COPD exacerbation

COPD exacerbation is an acute worsening of dyspnoea, cough and/or sputum over days. Bronchodilators are central; systemic corticosteroids improve recovery in severe exacerbations, and antibiotics are reserved for likely bacterial infection or selected high-risk presentations. Oxygen should be controlled rather than automatically maximised because some patients retain carbon dioxide.

Medicine/intervention	Purpose	Safety considerations
SABA or SAMA	Relieve acute airflow limitation	Monitor tachycardia, tremor, dry mouth and response; combine classes when protocol indicates.
Systemic corticosteroid	Shortens recovery and improves lung function in significant exacerbation	Check diabetes, infection and mental-health effects; use prescribed duration.
Antibiotic	Selected bacterial exacerbation, especially increased sputum purulence/volume and dyspnoea	Assess allergy, renal function, QT interactions and local antimicrobial guidance.
Controlled oxygen	Correct hypoxaemia while avoiding unnecessary hyperoxia	Use prescribed target range and repeat observations; do not withhold oxygen from a severely hypoxaemic patient.
NIV (CPAP/BiPAP)	Reduces work of breathing and improves ventilation in selected hypercapnic patients	Requires cooperative patient, intact airway and trained monitoring; vomiting or reduced consciousness may contraindicate.

8.1 Oxygen targets and hypercapnia

Oxygen is indicated for hypoxaemia, not simply breathlessness.
Use the locally authorised target range; patients at risk of hypercapnic respiratory failure are often managed with a lower controlled target than other acutely ill adults.
Obtain blood gases when available if drowsiness, confusion, severe COPD, rising oxygen requirement or suspected CO2 retention is present.
Do not remove oxygen abruptly from a hypoxaemic patient; titrate and escalate with monitoring.

9. Magnesium and second-line bronchodilation

IV magnesium sulfate may be considered in severe or life-threatening asthma that is not responding adequately to inhaled therapy and systemic corticosteroid. It relaxes smooth muscle and may reduce bronchospasm. It is not routine for every wheeze.

Check blood pressure, reflexes, renal function and local maximum dose; rapid administration can cause flushing, hypotension or weakness.
Prepare airway support because a failing patient may deteriorate while the medicine is being given.
Do not delay transfer or definitive ventilation planning while waiting for magnesium response.

10. Aminophylline and theophylline

Theophylline inhibits phosphodiesterase and antagonises adenosine receptors, but it has a narrow therapeutic window and many interactions. Nausea, vomiting, tremor, tachycardia, hypokalaemia, arrhythmia and seizures may indicate toxicity. It is not a casual rescue drug and should be used only under a specialist protocol with level monitoring.

11. Anaphylaxis and airway-threatening allergy

Anaphylaxis can cause airway swelling, bronchospasm, hypoxaemia, vasodilation and shock. IM adrenaline is the first-line medicine; antihistamines and corticosteroids must never delay adrenaline or replace ABCDE support. Severe bronchospasm without wheeze may indicate minimal air movement and impending respiratory failure.

Call for help, remove the trigger if possible and assess airway, breathing, circulation, skin and gastrointestinal symptoms.
Give IM adrenaline using the authorised concentration, site and age/weight dose; repeat according to the local algorithm if airway, breathing or circulation problems persist.
Lay the patient appropriately: supine with legs elevated for shock, or semi-recumbent if breathing is worse lying flat; do not allow a shocked patient to stand.
Give high-concentration oxygen for hypoxaemia or shock and establish IV/IO access for trained responders.
Use nebulised salbutamol for persistent bronchospasm as an adjunct, not as a replacement for adrenaline.
Antihistamines may help skin symptoms after stabilisation; corticosteroids are not first-line rescue for airway or circulatory collapse.
Prepare advanced airway and refractory-anaphylaxis support; observe for biphasic reactions.

Medicine	What it treats	What it cannot replace
IM adrenaline	Airway oedema, bronchospasm, vasodilation and shock	Nothing—this is the first-line emergency medicine.
Salbutamol nebuliser	Residual bronchospasm	Adrenaline and circulatory resuscitation
Antihistamine	Itch, urticaria and flushing after stabilisation	Adrenaline for ABC problems
Corticosteroid	Selected adjunctive inflammatory treatment	Immediate reversal of airway or circulatory collapse

12. Pulmonary oedema and cardiac breathlessness

Acute pulmonary oedema produces severe dyspnoea, crackles, hypoxaemia, orthopnoea and sometimes pink frothy sputum. The cause may be left-ventricular failure, myocardial infarction, hypertensive crisis, valvular disease, renal failure or fluid overload. Furosemide removes sodium and water over time; nitrates reduce preload and afterload when blood pressure permits. Neither should delay ventilation support.

Medicine/support	Mechanism	Safety check
Nitrates	Venodilation and, at higher doses, arterial dilation reduce cardiac filling pressures	Check blood pressure, right-ventricular infarction, severe aortic stenosis and recent PDE-5 inhibitor use.
Furosemide	Loop diuretic increases renal sodium and water excretion	Monitor BP, renal function, potassium and urine output; onset is not immediate in all cases.
CPAP/NIV	Raises airway pressure, recruits alveoli and reduces work of breathing	Requires alert patient with protected airway; monitor BP, mask fit, vomiting and fatigue.
Oxygen	Corrects hypoxaemia	Titrate to target; avoid unnecessary hyperoxia.

13. Respiratory infection medicines

Antibiotics treat susceptible bacterial infection; they do not treat uncomplicated viral coughs. EMT learners must recognise sepsis, pneumonia, tuberculosis risk and antimicrobial-resistance concerns. The medicine choice depends on local guidelines, site of infection, allergy, pregnancy, renal function and culture results.

Assess fever, respiratory rate, oxygen saturation, mental status, perfusion, pleuritic pain and sputum.
Give oxygen for hypoxaemia and arrange urgent transfer for cyanosis, hypotension, confusion, severe work of breathing or inability to maintain oral intake.
Do not delay antibiotics in suspected sepsis when authorised, but obtain cultures first only if this does not delay treatment.
Check for tuberculosis symptoms or exposure and apply infection-prevention measures.
Document the last antibiotic, allergy history and recent admissions to support antimicrobial stewardship.

14. Cough, mucus and upper-airway medicines

Group	Examples/role	Important cautions
Mucolytic	Acetylcysteine reduces mucus viscosity in selected chronic disease	May cause bronchospasm or nausea; combine with airway clearance and hydration advice.
Antitussive	Dextromethorphan or codeine suppress cough reflex in selected situations	Can sedate, interact with serotonergic medicines or worsen respiratory depression; cough may be protective.
Decongestant	Pseudoephedrine or topical sympathomimetic	May raise BP, cause palpitations, urinary retention or rebound congestion.
Antihistamine	Reduces allergic rhinorrhoea and itching	First-generation agents cause sedation and anticholinergic effects; not an anaphylaxis rescue.
Saline/steam support	Moistens secretions and relieves irritation	Avoid burns from hot steam; do not delay assessment of respiratory distress.

15. Oxygen and ventilatory support as medicines

Device	Typical use	Key safety point
Nasal cannula	Low-to-moderate oxygen requirement; comfortable and allows communication	Check actual flow and patient response; mouth breathing and congestion reduce delivery.
Simple face mask	Moderate oxygen delivery	Do not use at very low flow because exhaled CO2 can accumulate.
Non-rebreather mask	High oxygen concentration for severe hypoxaemia or shock	Inflate reservoir before placing and reassess; prepare definitive airway if the patient tires.
Venturi mask	Controlled oxygen concentration, particularly in COPD risk	Use the correct colour/flow combination and do not cover entrainment ports.
High-flow nasal oxygen	High flow with warmed humidification and controlled FiO2	Requires monitoring and escalation plan; not a substitute for a protected airway.
CPAP/BiPAP	Positive pressure for pulmonary oedema or selected hypercapnic failure	Contraindicated or unsafe with vomiting, severe agitation, shock or inability to protect airway.

16. Monitoring respiratory medicines

Before treatment: respiratory rate, pattern, work of breathing, speech, accessory muscles, air entry, wheeze/crackles, SpO2, pulse, BP, temperature, mental status and peak flow when appropriate.
During treatment: check device delivery, patient position, pulse, rhythm, SpO2, fatigue, tremor, chest pain and response to each dose.
After treatment: repeat observations, document oxygen device/flow, record response and watch for recurrence or delayed deterioration.
Blood gases: consider when severe COPD, drowsiness, altered consciousness, escalating oxygen, fatigue or suspected CO2 retention is present.

17. Interactions and special populations

Situation	Risk	Action
β2 agonist + diuretic or steroid	Additive hypokalaemia	Monitor ECG and potassium in severe or repeated therapy.
Theophylline + macrolide/ciprofloxacin	Raised theophylline level and toxicity	Check the full medicine list and avoid unmonitored combinations.
Non-selective beta-blocker + asthma	Bronchospasm and reduced β2 rescue response	Ask about eye drops and cardiac medicines; seek prescriber review.
Opioid/benzodiazepine + respiratory disease	Respiratory depression and CO2 retention	Titrate cautiously and monitor ventilation, not only SpO2.
Pregnancy	Untreated maternal hypoxaemia threatens mother and fetus	Use authorised medicines and treat significant hypoxaemia promptly; involve obstetric care.
Children	Small airways deteriorate quickly and dosing is weight-based	Use paediatric spacer/nebuliser technique and age-specific algorithms.
Older adults/heart disease	β2 agonists and decongestants may trigger tachyarrhythmia	Check pulse, ECG and chest pain; use the minimum effective protocol dose.

18. Clinical scenarios

Scenario 1: Severe asthma

A 19-year-old cannot complete sentences, is using accessory muscles and has a very quiet chest. Sit upright, give rapid inhaled bronchodilator plus ipratropium and systemic steroid under protocol, provide oxygen for hypoxaemia, call advanced help and prepare ventilation. A silent chest is a danger sign, not reassurance.

Scenario 2: COPD with drowsiness

A patient with COPD is drowsy and receiving increasing oxygen. Use controlled oxygen to the prescribed target, assess ventilation and obtain blood gases urgently. Do not assume that a normal SpO2 means adequate ventilation.

Scenario 3: Anaphylaxis

Minutes after an injection, a patient develops wheeze, lip swelling and hypotension. Give IM adrenaline immediately, call for help, position safely, give oxygen and use nebulised salbutamol only as an adjunct.

Scenario 4: Pulmonary oedema

An older adult has orthopnoea, crackles and severe hypertension. Sit upright, give oxygen for hypoxaemia, consider CPAP and nitrates if authorised and BP permits, and arrange cardiac monitoring and urgent transport.

Scenario 5: Theophylline toxicity

A patient taking theophylline has repeated vomiting, tremor and palpitations. Stop further doses, obtain ECG and urgent drug-level/renal assessment, and watch for seizures and ventricular arrhythmia.

Scenario 6: Pneumonia with sepsis

A febrile patient is confused, tachypnoeic and hypotensive with low SpO2. Treat ABCDE and sepsis priorities, give oxygen to target, establish access, obtain cultures when feasible and do not delay authorised antibiotics or transfer.

19. Documentation and handover

Record the indication, baseline respiratory findings, inhaler/nebuliser technique, oxygen device and flow, medicine name/concentration, route, time, response, adverse effects, repeat doses, peak flow or blood gases and escalation calls. Handover should include trigger, last rescue dose, current oxygen requirement, fatigue, mental state and concern for recurrence.

20. Revision questions

Compare SABA, LABA, SAMA and LAMA bronchodilators.
Why can high-dose salbutamol cause tremor, hypokalaemia and lactic acidosis?
Why should a nebuliser not delay airway preparation in severe asthma?
List signs of life-threatening asthma.
Explain why oxygen is a prescribed drug in COPD.
When are systemic corticosteroids used in asthma or COPD exacerbation?
What is the role of ipratropium in severe bronchospasm?
Why is theophylline a high-risk medicine?
What is first-line treatment for anaphylaxis?
Why are antihistamines not a substitute for adrenaline in anaphylaxis?
List the major contraindications or hazards of CPAP/BiPAP.
How do nitrates and furosemide help pulmonary oedema?
What are the clues to opioid-related hypoventilation in a respiratory patient?
Why must antibiotics not be prescribed for every cough?
How can inhaler technique change treatment effectiveness?
What monitoring is required during repeated nebulised β2 agonist therapy?
Why can silent chest indicate worsening airflow obstruction?
Which medicines can interact with theophylline?
How should a respiratory medicine response be documented?
Write a safe plan for a deteriorating COPD patient who becomes confused.

21. Key takeaways

Open the airway, support breathing and assess severity before choosing a respiratory medicine.
Salbutamol is rapid rescue bronchodilation, but repeated doses demand reassessment for arrhythmia, hypokalaemia and fatigue.
Inhaled corticosteroids prevent exacerbations; systemic corticosteroids are used early in significant attacks under protocol.
Controlled oxygen and ventilation targets matter, especially in COPD or hypercapnic respiratory failure.
IM adrenaline is first-line for anaphylaxis; bronchodilators, antihistamines and steroids are adjuncts.
Pulmonary oedema often needs upright positioning, oxygen/positive pressure, BP-appropriate vasodilation and urgent cardiac care.
Every treatment requires device verification, monitoring, documentation and a clear escalation plan.

22. Recommended references for further study

Clinical note: This page supports EMT learning and revision. It does not replace an authorised prescription, local emergency protocol, senior supervision or patient-specific advice. In a deteriorating patient, stabilise ABCDE, call for advanced help and transfer urgently.

Complete Respiratory Pharmacology Tables

Current principle: asthma should not be managed with a short-acting bronchodilator alone when an inhaled-corticosteroid-containing strategy is available and indicated. Confirm diagnosis, assess control and inhaler technique, reduce trigger exposure and use the current GINA/local pathway. COPD therapy follows symptom/exacerbation assessment, inhaler technique, smoking cessation, vaccination and pulmonary rehabilitation, aligned with GOLD/local guidance.

Bronchodilators and anti-inflammatory controllers

Medicine/class	Pharmacodynamics	Pharmacokinetics	Indications and example dose	Contraindications/precautions	Interactions	Side effects	Serious adverse effects	Nursing monitoring/teaching
Salbutamol (SABA)	β2-agonism relaxes bronchial smooth muscle; high doses also drive potassium into cells.	Inhaled onset within minutes, duration about 4–6 hours; hepatic metabolism and renal excretion.	Rapid relief of bronchospasm. Common MDI dose 1–2 puffs (100 micrograms/puff) as prescribed; acute severe asthma uses repeated spacer or nebulized weight/protocol-based doses.	Caution tachyarrhythmia, ischaemic heart disease, hyperthyroidism and hypokalaemia.	Non-selective beta-blockers oppose effect; diuretics, steroids and theophylline may worsen hypokalaemia; sympathomimetics increase cardiac effects.	Tremor, palpitations, tachycardia, headache, cramps.	Hypokalaemia, lactic acidosis, arrhythmia and paradoxical bronchospasm.	Record pre/post respiratory rate, work of breathing, wheeze, SpO2 and peak flow when feasible. Rising need or poor response signals deterioration—not simply a need for more inhaler.
Ipratropium (SAMA)	Muscarinic blockade reduces vagally mediated bronchoconstriction and secretion.	Poor systemic absorption when inhaled; local effect; renal elimination of absorbed drug.	Added to SABA in severe acute asthma and used in COPD; acute nebulized/MDI dosing follows protocol.	Narrow-angle glaucoma, bladder-neck obstruction/prostatic symptoms; avoid aerosol in eyes.	Additive anticholinergic effects with similar medicines.	Dry mouth, cough, bitter taste.	Acute glaucoma if nebulized mist enters eyes; urinary retention; paradoxical bronchospasm.	Use mouthpiece where possible, protect eyes, monitor urinary symptoms and teach device cleaning.
Inhaled corticosteroid: beclometasone/budesonide	Glucocorticoid receptor activation suppresses airway inflammation, hyperresponsiveness and exacerbation risk.	Deposited in lung; swallowed fraction undergoes first-pass metabolism. Benefit begins over days; maximal control takes longer.	Core asthma controller; dose depends on age, device and severity. Budesonide-formoterol may serve as maintenance-and-reliever therapy in appropriate regimens.	Not a sole rescue for rapidly worsening symptoms unless part of an approved ICS-formoterol reliever plan; caution untreated infection and high cumulative steroid exposure.	Strong CYP3A4 inhibitors can increase systemic steroid exposure, particularly some corticosteroids.	Oral candidiasis, dysphonia, throat irritation.	Adrenal suppression, osteoporosis, cataract/glaucoma and growth effects at high/prolonged doses; pneumonia risk in selected COPD patients.	Demonstrate technique and spacer; rinse and spit after dose; check adherence before escalating; monitor growth in children and systemic effects at high dose.
LABA: formoterol/salmeterol	Long-acting β2 agonism maintains bronchodilation; formoterol has rapid onset.	Inhaled, prolonged receptor effect; hepatic metabolism.	Maintenance in asthma only with ICS; COPD maintenance alone or in combinations. Formoterol with ICS can be used in specific reliever regimens.	Never use LABA monotherapy in asthma. Caution arrhythmia and hypokalaemia.	Beta-blockers, sympathomimetics and hypokalaemia-producing medicines.	Tremor, palpitations, headache.	Arrhythmia, hypokalaemia, paradoxical bronchospasm; uncontrolled asthma if used without ICS.	Verify the inhaler contains ICS for asthma, identify controller versus reliever, monitor exacerbations and technique.
Tiotropium (LAMA)	Long-acting muscarinic blockade produces sustained bronchodilation.	Inhaled once daily for many products; minimal metabolism, mainly renal elimination.	COPD maintenance; add-on in selected uncontrolled asthma.	Caution glaucoma, urinary retention and severe renal impairment.	Additive anticholinergic burden.	Dry mouth, constipation.	Urinary retention, glaucoma, hypersensitivity.	Not a rapid rescue medicine; teach capsule/device must not be swallowed, depending on product.

Systemic medicines, oxygen and adjuncts

Therapy	Mechanism/kinetics	Clinical use	Contraindications/interactions	Adverse effects	Nursing responsibilities
Prednisolone / IV hydrocortisone	Systemic glucocorticoid anti-inflammatory effect; hepatic metabolism and broad genomic effects.	Short course for moderate–severe asthma/COPD exacerbation; dose and duration by protocol. Oral route is effective when patient can swallow/absorb.	Caution diabetes, active infection, ulcer disease and psychosis; NSAIDs increase GI harm, live vaccines unsafe at immunosuppressive exposure.	Hyperglycaemia, mood change, dyspepsia, fluid retention; infection, adrenal suppression and osteoporosis with repeated/prolonged use.	Give early when indicated; monitor glucose, BP, infection and mental state; do not prolong unnecessarily. Taper requirements depend on dose/duration and clinician plan.
Magnesium sulfate IV	Reduces calcium-mediated smooth-muscle contraction and may improve bronchodilation.	Single-dose adjunct in severe acute asthma with poor initial response; weight/protocol-based and not routine for mild attacks.	Severe renal failure, heart block; potentiates neuromuscular blockers.	Flushing, nausea, hypotension; toxicity causes areflexia, respiratory depression and cardiac arrest.	Infuse as prescribed with BP, respiratory rate and reflex monitoring; check renal function; calcium gluconate and resuscitation capacity must be available.
Montelukast	Cysteinyl-leukotriene receptor antagonism reduces bronchoconstriction and inflammation; hepatic metabolism.	Add-on asthma therapy, particularly selected allergic/exercise-related disease; less effective than ICS for most controller needs.	Caution significant liver disease and neuropsychiatric history; enzyme inducers may reduce exposure.	Headache/abdominal pain; serious mood, sleep or behavioural changes and suicidal thoughts can occur.	Explain it is not a rescue medicine; screen and promptly report neuropsychiatric symptoms.
Oxygen	Raises inspired oxygen fraction and arterial oxygenation; a prescribed medical gas.	Titrate to a target saturation. In most critically ill adults 94–98% is usual; use 88–92% when at risk of hypercapnic respiratory failure until blood gases guide therapy, according to local protocol.	Fire/smoking risk; uncontrolled high concentration may worsen hypercapnia in susceptible COPD/neuromuscular/chest-wall disease.	Dryness, pressure injury; oxygen toxicity with prolonged high concentrations; CO2 retention.	Document device, flow/FiO2 and target; continuous SpO2 in unstable patients; obtain blood gas when hypercapnia risk; strict no-smoking/fire precautions.
Adrenaline IM	α1 vasoconstriction plus β1 cardiac and β2 bronchodilator effects.	First-line anaphylaxis with airway/respiratory/circulatory compromise: adult 500 micrograms IM (0.5 mL of 1 mg/mL) into anterolateral thigh, repeated per emergency protocol.	No absolute contraindication in life-threatening anaphylaxis; IV adrenaline requires expert monitored use.	Tremor, anxiety, tachycardia; severe hypertension/arrhythmia with dosing/route errors.	Call resuscitation team, lay patient appropriately, give IM promptly, repeat assessment every few minutes, oxygen/IV fluids and observation for biphasic reaction.

Acute severe asthma: sequence of care

Recognize severity: inability to complete sentences, exhaustion, silent chest, altered consciousness, cyanosis, poor respiratory effort, SpO2 reduction or peak flow below expected are danger signs.
ABCDE and call for help: sit upright if tolerated, monitor continuously, obtain IV access and prepare transfer/escalation.
Bronchodilate: repeated salbutamol by oxygen-driven nebulizer or MDI plus spacer; add ipratropium in severe/life-threatening attacks.
Reduce inflammation: give systemic corticosteroid early; do not wait for bronchodilator failure.
Reassess: work of breathing, speech, mental state, pulse, SpO2, peak flow where possible, potassium/lactate with intensive beta-agonist use.
Escalate: IV magnesium for selected severe poor responders; involve critical care early. Sedatives are dangerous. Antibiotics are not routine unless bacterial infection is supported.

Inhaler and nebulizer nursing checklist

Step	Metered-dose inhaler with spacer	Dry-powder inhaler
Prepare	Remove cap, check mouthpiece, shake, fit to spacer.	Load dose exactly as device instructions; do not shake unless specified.
Breath	Breathe out away from device; press one puff; inhale slowly and deeply or take 4–6 tidal breaths through spacer.	Breathe out away from device; inhale quickly and deeply.
Finish	Hold breath about 10 seconds if able; repeat one puff at a time after prescribed interval.	Hold breath if able; never exhale into device.
Aftercare	Rinse mouth after ICS; wash spacer as instructed and air-dry.	Rinse mouth after ICS; keep device dry and monitor dose counter.

Special cautions and nursing diagnoses

Ineffective airway clearance: position, hydration when safe, supported cough/suction where indicated, observe sputum and fatigue.
Impaired gas exchange: titrated oxygen, continuous assessment, blood gas when needed and rapid escalation for rising CO2 or exhaustion.
Deficient knowledge: have the patient demonstrate every inhaler; explain controller versus reliever and provide a written action plan.
Activity intolerance/anxiety: cluster care, reduce exertion, coach breathing and distinguish anxiety from hypoxaemia or impending respiratory failure.

Red flags: a “quiet” patient with a silent chest may be worse, not better. Falling respiratory effort, confusion, bradycardia, cyanosis or normalizing CO2 in a tiring asthmatic can signal imminent arrest.

Respiratory Medicines: Bronchodilators, Steroids, Oxygen and Emergency Care Read More »

Nervous System Medicines: Classes, Emergency Uses and Safety

Why this topic matters in emergency medical care

Neurological medicines can rapidly change consciousness, airway tone, breathing, seizure activity, pain, behaviour, blood pressure and intracranial physiology. Emergency medical technicians must know which medicines are time-critical, which can depress respiration, which must not be stopped suddenly and which findings require immediate referral. This lesson connects nervous-system pharmacology to structured assessment, safe administration and emergency decision-making.

The content is designed for EMT and nursing learners. It supports supervised clinical practice and examinations; use current Uganda Ministry of Health guidance, facility protocols, prescriber orders and product information for patient care.

Learning outcomes

Describe the organisation of the central and peripheral nervous systems and the neurotransmitters targeted by medicines.
Classify analgesics, anaesthetics, sedatives, antiseizure medicines, antiparkinson medicines, psychotropic medicines, antimigraine drugs and emergency antidotes.
Recognise and initially manage convulsive status epilepticus, opioid toxicity, acute agitation, stroke symptoms, severe headache and raised intracranial pressure.
Explain onset, duration, routes, adverse effects, interactions and monitoring requirements for high-risk neurological medicines.
Apply safe principles for airway protection, dose verification, titration, reassessment, documentation and handover.
Use clinical scenarios and revision questions to integrate pharmacology with ABCDE assessment.

1. Nervous-system physiology and medicine targets

The central nervous system (CNS) consists of the brain and spinal cord. The peripheral nervous system includes cranial and spinal nerves, sensory pathways and motor pathways. The autonomic nervous system regulates involuntary function: sympathetic activity supports “fight or flight,” while parasympathetic activity supports rest, digestion and recovery. Medicines can alter ion channels, neurotransmitter release, receptor activity, cerebral blood flow, pain pathways or neuromuscular transmission.

Target or neurotransmitter	Major effects	Medicines that act here	Emergency relevance
GABA	Inhibitory neurotransmission; reduces neuronal firing	Benzodiazepines, barbiturates, some anaesthetics	Stops seizures and reduces agitation, but excessive effect causes respiratory depression.
Glutamate	Major excitatory neurotransmission and learning	Ketamine and several antiseizure medicines modify glutamate pathways	Excitotoxicity contributes to brain injury; dissociative medicines alter perception and airway reflexes.
Opioid receptors	Analgesia, sedation, cough suppression and respiratory drive	Morphine, fentanyl, tramadol, codeine, naloxone	Overdose causes respiratory depression; naloxone can reverse the opioid component.
Dopamine	Movement, reward, attention and endocrine regulation	Levodopa, dopamine agonists, antipsychotics, metoclopramide blockade	Dopamine loss causes parkinsonism; dopamine blockade may cause rigidity or neuroleptic malignant syndrome.
Serotonin	Mood, nausea, pain modulation, sleep and vascular tone	SSRIs, SNRIs, triptans, ondansetron	Excess can cause serotonin syndrome; serotonergic combinations need careful review.
Acetylcholine	Memory, autonomic function and neuromuscular transmission	Anticholinergics, cholinesterase inhibitors, some muscle relaxants	Anticholinergic toxicity causes delirium, hyperthermia and urinary retention; cholinergic excess causes secretions and bradycardia.
Voltage-gated sodium/calcium channels	Action-potential generation and neurotransmitter release	Phenytoin, carbamazepine, lidocaine, gabapentin, pregabalin	Channel blockade suppresses seizures or pain but may cause arrhythmia, ataxia or sedation.

2. Practical classification of nervous-system medicines

Medicine group	Representative examples	Main role	Major safety concern
Non-opioid analgesics	Paracetamol/acetaminophen, NSAIDs	Mild–moderate pain and fever	Liver toxicity from overdose; renal, gastrointestinal and bleeding risks with NSAIDs
Opioid analgesics	Morphine, fentanyl, codeine, tramadol	Moderate–severe pain, palliative symptoms	Respiratory depression, hypotension, sedation, constipation and dependence
Local anaesthetics	Lidocaine, bupivacaine	Regional or local anaesthesia; selected arrhythmia indications	Local-anaesthetic systemic toxicity with seizures or cardiovascular collapse
Sedatives/anaesthetics	Midazolam, diazepam, ketamine, propofol	Seizures, procedural sedation, induction or agitation	Airway loss, hypoventilation, hypotension and aspiration
Antiseizure medicines	Levetiracetam, phenytoin/fosphenytoin, valproate, phenobarbital, carbamazepine, lamotrigine	Acute seizure termination and long-term seizure prevention	Respiratory depression, arrhythmia, rash, liver injury, pregnancy risks and interactions
Antiparkinson medicines	Levodopa/carbidopa, dopamine agonists, amantadine, MAO-B inhibitors	Improve bradykinesia, rigidity and tremor	Do not omit scheduled levodopa; hypotension, hallucinations and dyskinesia may occur
Psychotropic medicines	Antidepressants, antipsychotics, mood stabilisers, anxiolytics	Depression, psychosis, bipolar disorder and anxiety	Suicide risk, QT prolongation, serotonin syndrome, lithium toxicity and neuroleptic malignant syndrome
Antimigraine medicines	Triptans, antiemetics, preventive anticonvulsants or beta-blockers	Acute or preventive migraine treatment	Vascular contraindications, medication-overuse headache and sedation
Antidotes	Naloxone, flumazenil, atropine, pralidoxime	Reverse selected toxic effects	Withdrawal, seizures, dysrhythmia or incomplete reversal; antidote never replaces ABCDE care

3. General principles of nervous pharmacology

Small dose changes can have large effects: the therapeutic window is narrow for opioids, sedatives, lithium, phenytoin and tricyclic antidepressants.
Airway and breathing come first: a medicine that improves agitation but removes airway protection may worsen the overall emergency.
Time and trend matter: document the pre-treatment neurological state and reassess after onset, peak and any repeat dose.
Never stop some medicines abruptly: sudden withdrawal of benzodiazepines, opioids, antiseizure medicines, levodopa or corticosteroids can trigger severe rebound effects.
Think of interactions: alcohol, opioids, sedatives, antihistamines and antipsychotics can combine to depress consciousness and ventilation.
Check the cause before labelling behaviour: hypoglycaemia, hypoxia, stroke, head injury, sepsis, intoxication and postictal confusion can all look like agitation or psychosis.

4. Analgesics and antipyretics

4.1 Paracetamol/acetaminophen

Paracetamol is useful for mild-to-moderate pain and fever and is often combined with another analgesic. Therapeutic dosing is generally well tolerated, but overdose saturates normal conjugation pathways and produces toxic metabolites that can cause delayed hepatic failure. Ask about all combination products because patients may unknowingly take paracetamol from several sources.

Check weight, liver disease, malnutrition, chronic alcohol use and the total dose taken in the previous 24 hours.
Do not rely on the patient appearing well after an overdose; early symptoms may be mild before liver injury develops.
Urgent referral is required for intentional overdose, an unknown amount, staggered ingestion or symptoms of hepatic injury.

4.2 Non-steroidal anti-inflammatory drugs (NSAIDs)

Effect	Benefit	Important adverse effect	Use caution or avoid in
COX inhibition	Reduces prostaglandin-mediated pain, fever and inflammation	Dyspepsia, ulceration, gastrointestinal bleeding	Peptic ulcer disease, anticoagulation or active bleeding
Renal prostaglandin reduction	Analgesic and anti-inflammatory effect	Acute kidney injury, sodium retention and hypertension	Dehydration, shock, chronic kidney disease or heart failure
Platelet effects (especially aspirin)	Antiplatelet action at low dose	Bleeding and bronchospasm in aspirin-sensitive asthma	Haemorrhage, severe allergy or suspected intracranial bleeding
Pregnancy effects	Short-term symptom relief when prescribed	Fetal and maternal risks vary by trimester	Pregnancy requires clinician-directed selection and dose.

4.3 Opioid analgesics

Opioids activate mu receptors and produce analgesia, euphoria, sedation, reduced cough and dose-dependent respiratory depression. Morphine may release histamine and lower blood pressure; fentanyl acts rapidly and may cause chest-wall rigidity with very rapid high doses. Tramadol also affects serotonin and noradrenaline pathways and can provoke seizures or serotonin syndrome.

Medicine	Useful feature	Major concern	EMT monitoring
Morphine	Strong analgesia; familiar emergency medicine	Hypoventilation, hypotension, nausea, histamine reaction	Respiratory rate, SpO2, work of breathing, BP, mental status and pain score
Fentanyl	Rapid, potent analgesia with less histamine release	Apnoea, chest-wall rigidity, bradycardia	Continuous respiratory observation; have airway and ventilation equipment ready
Codeine	Oral mild–moderate analgesia in selected patients	Variable metabolism, sedation, constipation and dependence	Assess other sedatives and respiratory disease
Tramadol	Dual analgesic mechanism	Seizures and serotonin syndrome, especially with antidepressants	Ask about SSRIs/SNRIs/MAOIs and seizure history

5. Sedatives, benzodiazepines and procedural medicines

5.1 Benzodiazepines

Midazolam, diazepam and lorazepam enhance GABA-A receptor activity. They reduce anxiety, induce sedation, relax skeletal muscle and terminate seizures. They are first-line medicines in many convulsive seizure protocols, but the same respiratory-depressant effect becomes dangerous when combined with opioids, alcohol or other sedatives.

Medicine	Common emergency role	Advantages	Risks and monitoring
Midazolam	Buccal, intranasal, IM or IV seizure rescue; procedural sedation	Rapid onset and non-IV routes	Apnoea, hypotension and paradoxical agitation; monitor airway, breathing and level of consciousness.
Lorazepam	IV seizure termination; selected severe agitation	Longer anticonvulsant effect than diazepam	Respiratory depression and prolonged sedation, especially in older adults or lung disease.
Diazepam	IV or rectal seizure rescue; muscle spasm	Rapid CNS penetration and available rectal route	Redistribution can cause seizure recurrence; respiratory depression and hypotension.

5.2 Ketamine and propofol

Ketamine: dissociative anaesthesia through NMDA receptor antagonism. It can provide analgesia and preserve spontaneous breathing better than many sedatives, but laryngospasm, hypersalivation, vomiting, emergence reactions, hypertension or tachycardia may occur. It still requires airway preparedness.
Propofol: rapid induction and short recovery, but dose-related hypotension, apnoea and loss of airway reflexes are common. It requires advanced airway skills and continuous monitoring.
Etomidate: rapid induction with comparatively limited cardiovascular depression in some settings, but myoclonus, adrenal suppression and injection discomfort are possible. Use only within the authorised advanced airway protocol.

6. Local anaesthetics and local-anaesthetic systemic toxicity

Lidocaine, bupivacaine and related agents block voltage-gated sodium channels. They prevent nerve conduction when injected locally. If too much enters the circulation, early neurological symptoms (perioral tingling, metallic taste, tinnitus, dizziness, agitation or seizures) may progress to bradycardia, wide-complex arrhythmia and cardiovascular collapse.

Stop injecting, call for advanced help and bring the lipid-emulsion rescue kit if available.
Support airway and ventilation; correct hypoxia and acidosis because they worsen toxicity.
Treat seizures with a benzodiazepine in a carefully titrated dose; avoid large doses of local anaesthetic or additional sodium-channel blockers.
Follow the local lipid-emulsion and resuscitation protocol for cardiovascular toxicity; standard cardiac arrest algorithms may need modification.

7. Antiseizure medicines

Antiseizure medicines reduce neuronal excitability through sodium-channel inactivation, calcium-channel modulation, GABA enhancement or multiple mechanisms. Choice depends on seizure type, age, pregnancy, comorbidity, interactions and availability. A person who is seizure-free on a regular medicine can deteriorate when doses are missed, vomiting prevents absorption or a drug interaction lowers levels.

Medicine	Principal action	Common use	Important adverse effects
Levetiracetam	Modulates synaptic vesicle protein SV2A	Focal and generalised seizures; IV loading in status epilepticus	Somnolence, dizziness, irritability or behavioural change; adjust in renal impairment.
Phenytoin/fosphenytoin	Use-dependent sodium-channel blockade	Established status epilepticus and long-term focal seizure control	Hypotension, arrhythmia with rapid IV use, nystagmus, ataxia, gingival hyperplasia and many interactions.
Valproate	Multiple effects on sodium channels and GABA	Generalised seizures, status epilepticus in selected patients, mood stabilisation	Hepatotoxicity, pancreatitis, thrombocytopenia, weight gain and major fetal risk; avoid in pregnancy unless specialist direction.
Phenobarbital	Enhances GABA-mediated inhibition	Established status epilepticus; selected neonatal or resource-limited protocols	Respiratory depression, hypotension, sedation and enzyme induction.
Carbamazepine	Sodium-channel blockade	Focal seizures and trigeminal neuralgia	Hyponatraemia, rash/Stevens–Johnson syndrome, blood dyscrasias and interactions.
Lamotrigine	Sodium-channel blockade and reduced glutamate release	Focal/generalised epilepsy and bipolar maintenance	Serious rash if titrated rapidly; do not restart at a full dose after a prolonged interruption without advice.
Gabapentin/pregabalin	Modulate alpha-2-delta calcium-channel subunit	Neuropathic pain and selected seizure disorders	Dizziness, ataxia, sedation and additive respiratory depression with opioids.

8. Convulsive seizures and status epilepticus

Status epilepticus is a medical emergency. A convulsive seizure lasting five minutes or more, or repeated seizures without recovery, should trigger a time-based emergency response. WHO and NICE guidance support immediate benzodiazepine treatment, with a second-line IV antiseizure medicine if seizures persist after two benzodiazepine doses and appropriate monitoring is available.

8.1 First five minutes: safety and ABCDE

Protect the patient from injury; remove nearby hazards and cushion the head. Do not restrain limbs or place anything in the mouth.
Note the exact start time, seizure pattern, focal signs, pregnancy status, diabetes, fever, trauma and known epilepsy.
Assess airway and breathing after convulsions; suction secretions, position laterally when safe and provide oxygen for hypoxaemia.
Check capillary glucose early and correct severe hypoglycaemia; consider thiamine before glucose in a severely malnourished alcohol-dependent patient when this does not delay glucose.
Obtain IV/IO access, monitor ECG and vital signs, and look for reversible causes: hypoglycaemia, eclampsia, infection, stroke, head injury, electrolyte abnormality or intoxication.

8.2 Time-based medicine sequence

Time/response	Action	Reasoning
Seizure ≥5 minutes	Give the authorised first-line benzodiazepine by the fastest safe route; prepare ventilation support.	Early treatment reduces progression to established status.
Still convulsing after 5–10 minutes	Repeat one benzodiazepine dose only if the protocol permits; reassess airway and breathing.	Repeated sedatives can cause apnoea; count total doses and time.
After two benzodiazepine doses	Escalate for IV levetiracetam, valproate, phenytoin/fosphenytoin or phenobarbital according to local protocol.	Established status needs a longer-acting antiseizure medicine and monitored care.
Refractory status	Advanced airway, ICU-level anaesthesia and continuous EEG may be required.	Ongoing electrical seizure activity may persist despite visible cessation.

Postictal care: do not assume persistent unconsciousness is “just postictal.” Recheck glucose, oxygenation, temperature, pupils, trauma, toxins and focal neurological signs. Non-convulsive status, stroke, hypoxia and intracranial bleeding can mimic a prolonged postictal state.

9. Stroke and cerebrovascular emergency medicines

Stroke is a time-critical neurological emergency. Medicines are selected only after brain imaging and specialist assessment have distinguished ischaemic from haemorrhagic stroke. The EMT’s contribution is rapid recognition, glucose check, last-known-well time, airway support, blood-pressure and rhythm assessment, and transport to a stroke-capable facility.

Medicine/intervention	Purpose	Important safety point
IV thrombolytic (alteplase or tenecteplase where authorised)	Reperfuses eligible acute ischaemic stroke by dissolving fibrin clot	Requires specialist eligibility, imaging, time window and bleeding-risk assessment; never give for an undifferentiated stroke in the field.
Antiplatelet therapy	Reduces recurrent platelet-mediated thrombosis after haemorrhage is excluded	Timing depends on imaging and thrombolysis status; avoid assuming aspirin is safe before the stroke type is known.
Anticoagulant reversal	Limits bleeding in intracranial haemorrhage associated with anticoagulants	Specific reversal depends on the drug and time of last dose; urgent hospital laboratory and specialist input are required.
Blood-pressure agents	Carefully lower dangerously high pressure or meet thrombolysis thresholds	Over-rapid reduction may worsen cerebral perfusion; treat according to stroke protocol.
Glucose treatment	Corrects hypoglycaemia that can mimic stroke	Reassess neurological deficits after glucose but do not delay stroke transfer if deficits persist.

9.1 Stroke assessment checklist

Use a validated screen such as FAST/BE-FAST and record the exact time last known well.
Check glucose, oxygen saturation, temperature, blood pressure, pulse and rhythm.
Ask about anticoagulants, antiplatelets, recent surgery, bleeding, seizures, migraine and previous disability.
Keep the patient nil by mouth until a swallow assessment; protect the airway and position safely.
Pre-alert the receiving stroke service and bring the medicine list or anticoagulant package.

10. Raised intracranial pressure and cerebral oedema

Raised intracranial pressure may follow traumatic brain injury, intracranial haemorrhage, tumour, infection, hydrocephalus or severe metabolic injury. Warning signs include worsening headache, vomiting, reduced consciousness, unequal pupils, new focal weakness, abnormal posturing, hypertension with bradycardia and irregular breathing.

Prioritise oxygenation and ventilation; avoid hypoxia and hypotension because both worsen secondary brain injury.
Keep the head midline with modest elevation when not contraindicated, avoid tight collars or tubes obstructing venous drainage and prevent fever.
Hypertonic saline or mannitol may be used in specialist protocols; these require serum sodium/osmolality, renal function, haemodynamic assessment and controlled administration.
Do not give routine hyperventilation as a prolonged treatment. Brief controlled ventilation may be a bridge for impending herniation under advanced guidance.
Urgent neurosurgical and critical-care transfer is required for deteriorating consciousness, pupillary change or herniation signs.

11. Opioid toxicity and naloxone

Opioid overdose classically produces reduced consciousness, slow or absent breathing, pinpoint pupils and reduced bowel sounds, but pupils can be normal and mixed overdoses are common. WHO identifies naloxone as a medicine that can prevent death when given in time. The priority remains ventilation and oxygenation; naloxone is a titrated reversal medicine, not a substitute for basic life support.

Ensure scene safety and use standard precautions; consider an unknown substance or co-ingestants.
Open the airway, provide rescue breaths or bag-mask ventilation and oxygen as indicated. Call for advanced help.
Give naloxone by the authorised route and concentration, titrating to adequate spontaneous breathing rather than complete arousal or severe withdrawal.
Reassess repeatedly. Naloxone may wear off before a long-acting opioid, so recurrent respiratory depression is possible.
Search for trauma, hypoglycaemia, stroke, sepsis or sedative co-ingestion; transport for observation even when the patient initially improves.

Target of naloxone: adequate ventilation and airway protection. A suddenly agitated, vomiting patient in acute withdrawal is not necessarily “fully treated”; continue monitoring and protect staff and patient.

12. Flumazenil and mixed sedative overdose

Flumazenil can antagonise benzodiazepine effects but is not a routine antidote for undifferentiated coma. It can precipitate seizures or acute withdrawal in chronic benzodiazepine users, mixed overdoses or patients with pro-convulsant co-ingestants such as tricyclic antidepressants. Supportive airway and ventilation care is usually safer while the toxicology plan is clarified.

13. Acute agitation, psychosis and behavioural emergencies

Agitation is a symptom, not a diagnosis. Hypoxia, hypoglycaemia, head injury, delirium, sepsis, stroke, intoxication, withdrawal, mania and psychosis require different treatment. Verbal de-escalation, a low-stimulation environment and a team safety plan come before medication whenever possible.

Medicine group	Examples	Useful role	Major risks
Benzodiazepine	Midazolam, lorazepam	Severe anxiety, stimulant intoxication, alcohol withdrawal or rapid sedation when indicated	Respiratory depression, paradoxical agitation and hypotension; avoid stacking with opioids without close monitoring.
Antipsychotic	Haloperidol, olanzapine, risperidone	Psychosis or severe agitation under a clinician-directed protocol	QT prolongation, dystonia, hypotension, aspiration and neuroleptic malignant syndrome.
Ketamine	Ketamine	Extreme excited delirium or dangerous agitation when rapid control is necessary	Airway complications, hypertension, tachycardia and emergence reactions; advanced monitoring is essential.

13.1 Neuroleptic malignant syndrome (NMS)

NMS is a life-threatening reaction to dopamine blockade or abrupt withdrawal of dopaminergic medicines. Fever, severe rigidity, altered mental status, autonomic instability and markedly raised creatine kinase are characteristic. Stop the causative medicine, begin cooling and ABCDE support, treat complications and arrange urgent critical-care review.

14. Antidepressants and serotonin safety

Class	Examples	Clinical role	Emergency cautions
SSRIs	Fluoxetine, sertraline, citalopram, escitalopram	Depression, anxiety and several trauma-related conditions	Delayed benefit; nausea, sexual effects, hyponatraemia, bleeding and serotonin syndrome. Citalopram/escitalopram may prolong QT.
SNRIs	Venlafaxine, duloxetine	Depression, anxiety and some neuropathic pain	Blood-pressure elevation, withdrawal symptoms and serotonin toxicity.
Tricyclic antidepressants	Amitriptyline, imipramine	Depression and neuropathic pain in selected patients	Overdose causes anticholinergic delirium, seizures, hypotension and wide-QRS arrhythmia.
MAO inhibitors	Phenelzine, tranylcypromine; selegiline in selected Parkinson care	Specialist treatment	Many food and drug interactions; serotonin syndrome or hypertensive crisis.
Mirtazapine	Mirtazapine	Depression with insomnia or poor appetite in selected patients	Sedation and weight gain; overdose still requires assessment.

14.1 Serotonin syndrome

Serotonin syndrome develops after serotonergic excess, often from combinations or overdose. Mental-status change, autonomic instability, hyperreflexia, clonus, tremor, sweating, diarrhoea and hyperthermia are clues. Stop serotonergic agents, provide supportive care, control agitation and temperature, and urgently escalate when rigidity, hyperthermia or organ failure develops.

15. Antipsychotics and mood stabilisers

Group	Examples	Important monitoring	Emergency warning
First-generation antipsychotics	Haloperidol, chlorpromazine	ECG/QT, movement symptoms, blood pressure, temperature	Acute dystonia, akathisia, NMS, torsades risk and sedation.
Second-generation antipsychotics	Risperidone, olanzapine, quetiapine, aripiprazole	Metabolic parameters, movement symptoms, ECG and sedation	Orthostatic hypotension, aspiration, NMS and increased stroke/mortality risk in some older adults with dementia.
Lithium	Lithium carbonate	Serum level, renal/thyroid function, sodium and hydration	Tremor, ataxia, vomiting, diarrhoea, confusion, coarse tremor and seizures indicate possible toxicity.
Valproate/carbamazepine/lamotrigine	Mood stabilisers also used as antiseizure medicines	Liver function, blood count, pregnancy risk and drug levels where indicated	Severe rash, liver failure, pancreatitis, blood dyscrasia or toxicity.

15.1 Lithium toxicity

Risk increases with dehydration, vomiting/diarrhoea, kidney impairment, low sodium and interacting medicines such as NSAIDs, ACE inhibitors or thiazide diuretics.
Do not induce vomiting. Protect the airway, stop further lithium, obtain urgent levels/electrolytes/renal function and transport.
Neurological signs may progress from coarse tremor and ataxia to confusion, seizures and coma; cardiac monitoring is important.

16. Parkinson medicines

Parkinson disease involves loss of dopamine-producing neurons, causing bradykinesia, rigidity, tremor and postural instability. NICE emphasises timely administration of levodopa in hospital because delayed or omitted doses can cause severe immobility, swallowing difficulty or an akinetic crisis.

Medicine/class	Action	Common concerns	Emergency teaching point
Levodopa + carbidopa/benserazide	Replaces dopamine precursor; peripheral decarboxylase inhibitor reduces nausea	Wearing-off, dyskinesia, hallucinations, orthostatic hypotension	Give at the patient’s individual times; do not substitute with a generic “three times daily” schedule.
Dopamine agonists	Stimulate dopamine receptors	Somnolence, hallucinations, impulse-control disorder, hypotension	Sudden withdrawal can cause severe rigidity or dopamine-agonist withdrawal syndrome.
MAO-B inhibitors	Reduce dopamine breakdown	Interactions with serotonergic or sympathomimetic medicines	Check the full medicine list before giving interacting analgesics or antidepressants.
Amantadine	Modulates dopamine and glutamate pathways	Confusion, hallucinations, ankle oedema and renal accumulation	Reduce risk by checking renal function and mental state.

17. Migraine and severe headache medicines

Before labelling a headache “migraine,” screen for thunderclap onset, fever/neck stiffness, new neurological deficit, papilloedema, pregnancy-related hypertension, head trauma, cancer, immunosuppression or a new headache in older age. These red flags require urgent assessment rather than repeated analgesia.

Medicine	Role	Safety points
Triptans (for example sumatriptan)	5-HT1 receptor agonists that constrict cranial vessels and reduce trigeminal signalling	Avoid in significant ischaemic heart disease, uncontrolled hypertension, some cerebrovascular disease and with certain interacting medicines.
Antiemetics (metoclopramide, prochlorperazine)	Treat nausea and may improve migraine symptoms	Dystonia, akathisia, sedation and QT effects; metoclopramide blocks dopamine.
NSAID or paracetamol	Analgesia for acute migraine when appropriate	Check renal, gastrointestinal, liver and bleeding risks; avoid medication overuse.
Preventive medicines	Beta-blockers, topiramate, valproate and others	Selection depends on pregnancy, asthma, cognition, mood and comorbidity; not an acute rescue dose.

18. High-risk interactions and special populations

Situation	Why risk increases	Practical action
Opioid + benzodiazepine/alcohol	Additive respiratory depression and loss of airway reflexes	Use the lowest authorised dose, monitor continuously and have ventilation equipment ready.
Valproate in pregnancy	Major fetal and neurodevelopmental risk	Do not stop suddenly; urgent specialist review and pregnancy-safe planning are required.
Antiseizure medicine + oral contraceptive	Enzyme induction can reduce contraceptive effectiveness	Ask about pregnancy possibility and counsel for specialist review.
SSRI/SNRI + tramadol/MAOI/triptan	Serotonin syndrome risk	Check for clonus, hyperreflexia, fever and autonomic instability.
Lithium + dehydration/NSAID/ACE inhibitor	Reduced renal clearance and toxicity	Stop further doses pending clinician review; check hydration and renal status.
Parkinson disease + dopamine-blocking antiemetic	Worsens rigidity and movement	Ask for a Parkinson-safe alternative and preserve levodopa timing.
Renal or hepatic failure	Accumulation changes sedative and antiseizure exposure	Use prescribed dose adjustments and longer monitoring; avoid casual repeat doses.

19. Medication administration and monitoring checklist

Indication: identify the problem being treated and exclude a reversible cause such as hypoglycaemia or hypoxia.
Patient: confirm two identifiers, allergies, age, weight, pregnancy status and baseline neurological state.
Medicine: verify name, concentration, expiry, route, prescribed dose and maximum repeat dose.
Interactions: ask specifically about opioids, alcohol, benzodiazepines, antidepressants, antiseizure medicines, anticoagulants and Parkinson medicines.
Preparation: prepare airway, oxygen, suction, bag-mask ventilation, monitoring and a second clinician before sedating or giving a seizure medicine.
Administration: give slowly or titrate when required; do not stack doses without counting time and effect.
Reassessment: record respiratory rate, oxygen saturation, pulse, blood pressure, GCS/AVPU, pupils, seizure activity, pain and adverse effects.
Handover: communicate the indication, exact time/dose/route, response, remaining risk and next monitoring requirement.

20. Clinical scenarios

Scenario 1: Convulsive status epilepticus

A patient has been convulsing continuously for seven minutes. Protect from injury, time the seizure, check glucose, support airway and breathing, and give the authorised benzodiazepine promptly. If still convulsing after two doses, escalate for a monitored second-line antiseizure medicine rather than repeatedly giving sedatives without airway support.

Scenario 2: Postictal confusion or stroke?

A patient remains aphasic and weak on one side 30 minutes after a witnessed seizure. Do not assume postictal paralysis without reassessment. Check glucose, document last known well, evaluate focal deficits and transport urgently for stroke and intracranial pathology assessment.

Scenario 3: Opioid overdose

A drowsy patient has a respiratory rate of six and shallow breaths. Begin ventilation and oxygen, call for advanced help and give titrated naloxone under protocol. Continue observation because a long-acting opioid may outlast naloxone.

Scenario 4: Severe agitation

An agitated patient is hot, confused and tachycardic. Before sedation, check glucose, oxygenation, temperature, trauma, intoxication and infection. Use de-escalation and a team safety plan; if medication is essential, choose a protocol-based option with airway and ECG monitoring.

Scenario 5: Lithium toxicity

A patient taking lithium has vomiting, coarse tremor and ataxia after several days of diarrhoea. Stop further doses pending medical review, protect the airway, check glucose and ECG, establish access and arrange urgent renal function and lithium-level testing.

Scenario 6: Parkinson medicine omission

An inpatient with Parkinson disease becomes rigid and unable to swallow after levodopa doses were omitted. Treat the missed timing as clinically important, seek the prescribed alternative route and avoid dopamine-blocking antiemetics unless specifically directed.

Scenario 7: Thunderclap headache

A patient reports the “worst headache of life” reaching maximum intensity within seconds. Do not repeatedly administer migraine medicines without investigation. Stabilise, assess for meningism and neurological deficit, record onset exactly and transport urgently.

21. Calculations and dose safety

For a weight-based medicine, dose required = ordered dose per kilogram × weight in kilograms. For a liquid, volume = dose required ÷ concentration. Write units at each step and independently recheck high-alert medicines. Never convert milligrams, micrograms, millilitres and units from memory during a moving emergency.

Calculation check	Question to ask	Common error
Weight	Is the weight current and in kilograms?	Using pounds as kilograms or an estimated adult dose in a child
Concentration	How many mg/mL, micrograms/mL or units/mL are in this ampoule?	Confusing different strengths or prefilled devices
Maximum dose	Has the patient already received a dose from another team or carer?	Duplicate dosing during handover failure
Infusion rate	What pump rate delivers the prescribed dose per hour?	Mixing up total volume per hour with drug dose per hour
Reassessment time	When will effect, peak or recurrence be checked?	Giving repeated sedative or naloxone doses too close together

22. Documentation and structured handover

Document baseline mental status, GCS/AVPU, pupils, seizure duration and pattern, airway interventions, oxygenation, glucose, pain score, medicine name/concentration, dose, route, exact time, response, adverse effects and repeat doses. Use an SBAR handover:

Situation: “Seven-minute convulsive seizure” or “opioid-associated respiratory depression.”
Background: known epilepsy, pregnancy, Parkinson disease, opioid prescription, anticoagulants, psychiatric medicines and allergies.
Assessment: airway, breathing, circulation, neurological signs, glucose, temperature, ECG and response to treatment.
Recommendation: required imaging, toxicology, ICU review, repeat observations and concern about recurrence.

23. Revision questions

Explain why benzodiazepines can stop seizures but also cause respiratory depression.
List the first priorities when a patient is convulsing for more than five minutes.
What is the difference between a postictal state and ongoing non-convulsive status?
Compare levetiracetam, phenytoin/fosphenytoin, valproate and phenobarbital in status epilepticus.
Why should glucose be checked early in any patient with altered consciousness?
Describe the classic opioid toxidrome and the correct target of naloxone therapy.
Why is flumazenil unsafe in some benzodiazepine overdoses?
List the red flags that make a headache an emergency rather than routine migraine.
Explain the pre-hospital contribution to acute stroke care before imaging.
What are the signs of local-anaesthetic systemic toxicity?
Why must levodopa be given at the patient’s prescribed time?
Compare serotonin syndrome and neuroleptic malignant syndrome.
List four causes of acute agitation that are not primary psychiatric illness.
Why is lithium toxicity more likely after dehydration or NSAID use?
What monitoring is required after giving an opioid or benzodiazepine?
Which antiseizure medicines have major pregnancy concerns?
What is the safest approach to suspected mixed sedative overdose?
How can antidepressants contribute to serotonin syndrome?
Why is repeated analgesia unsafe in thunderclap headache?
Write the essential elements of a neurological medicine handover.

24. Key takeaways

Neurological medicines can improve pain, seizures and behaviour while simultaneously threatening airway protection and breathing.
Status epilepticus is time-critical: protect, check glucose, give protocol-based benzodiazepine treatment and escalate after two doses.
Naloxone reverses opioid effects, but ventilation and continued observation remain essential.
Stroke medicines are selected only after urgent assessment and brain imaging; EMTs preserve the treatment window through rapid transport and accurate last-known-well documentation.
Do not omit scheduled levodopa, antiseizure medicines or other high-risk chronic medicines without clinical advice.
Serotonin syndrome, neuroleptic malignant syndrome, lithium toxicity and local-anaesthetic systemic toxicity require early recognition and urgent escalation.
Every sedative, opioid or seizure medicine dose needs airway preparation, monitoring, exact documentation and a planned reassessment.

25. Recommended references for further study

Clinical note: This page supports EMT learning and revision. It does not replace an authorised prescription, local emergency protocol, senior clinical supervision or individual toxicology/neurology advice. In a deteriorating patient, stabilise ABCDE, call for advanced help and transfer urgently.

Complete Nervous System Pharmacology Tables

Dosage safety: The doses below are common adult teaching examples. The authorised prescription, indication-specific emergency protocol, current Uganda Clinical Guidelines and product information take priority. Confirm age, weight, pregnancy, airway/ventilation, consciousness, renal/hepatic function, ECG, current medicines and substance use. Paediatric doses are weight-based.

Analgesics, Antipyretics and Opioid Reversal

Medicine	Pharmacodynamics and pharmacokinetics	Indications and common dosage examples	Contraindications and precautions	Interactions	Side effects and serious adverse effects	Monitoring and nursing responsibilities
Paracetamol	Central analgesic/antipyretic with minimal peripheral anti-inflammatory action. Rapid oral absorption; hepatic glucuronidation/sulfation, with a small CYP-derived toxic metabolite detoxified by glutathione.	Mild–moderate pain and fever. Adult 500–1,000 mg orally every 4–6 hours; usual maximum 4 g/day, but lower limits are required with low body weight, malnutrition, alcohol misuse or liver disease.	Severe active liver disease. Caution chronic alcohol use, fasting, enzyme inducers and duplicate combination products.	Chronic regular use may increase warfarin effect. Enzyme inducers and alcohol increase toxicity risk.	Usually well tolerated. Serious overdose causes delayed hepatic necrosis, hypoglycaemia, acidosis and liver failure.	Total every source over 24 hours. In overdose obtain time, dose and weight; send level at correct time; start N-acetylcysteine promptly by protocol without waiting when indicated.
Ibuprofen/NSAIDs	Reversible COX-1/COX-2 inhibition lowers prostaglandins. Oral absorption; highly protein-bound, hepatic metabolism and renal excretion.	Inflammatory pain, dysmenorrhoea and fever. Adult ibuprofen commonly 200–400 mg every 6–8 hours with food; prescription maximum varies, and use the lowest effective dose for shortest duration.	Active GI bleeding/ulcer, severe renal failure, NSAID allergy, peri-CABG pain and third-trimester pregnancy. Caution asthma, heart failure, hypertension and dehydration.	Anticoagulants/antiplatelets/steroids increase bleeding. ACE inhibitor/ARB plus diuretic increases AKI risk. May reduce antihypertensive effect.	Dyspepsia, nausea, oedema. Serious: GI haemorrhage, AKI, bronchospasm, cardiovascular events and severe skin reaction.	Assess pain, GI bleeding, renal function, hydration and BP. Avoid duplicate NSAIDs. Withhold and escalate for melaena, haematemesis, oliguria, wheeze or facial swelling.
Morphine	Mu-opioid agonist produces analgesia, sedation and respiratory depression. Hepatic glucuronidation; active metabolites accumulate in renal impairment.	Severe acute pain and palliative indications. Opioid-naive adult IV titration may use 2–5 mg slowly at monitored intervals; oral doses and repeat frequency are individualised.	Severe respiratory depression without ventilatory support, paralytic ileus. Caution head injury, hypotension, renal failure, older age and obstructive sleep apnoea.	Benzodiazepines, alcohol, sedating antihistamines and antipsychotics greatly increase respiratory depression. MAO inhibitor history requires caution.	Nausea, constipation, pruritus, urinary retention, miosis and sedation. Serious: apnoea, hypotension, aspiration and dependence.	Record pain, sedation score, RR, SpO2, BP and pupils before/after. Titrate, do not chase pain at expense of ventilation. Have oxygen, airway equipment and naloxone. Institute bowel plan for ongoing use.
Naloxone	Competitive opioid receptor antagonist; IV action in 1–2 minutes but duration is shorter than many opioids. Hepatic metabolism.	Suspected opioid-induced respiratory depression. Titrate 0.04–0.4 mg IV in opioid-dependent patients or 0.4–2 mg when urgent reversal is needed; IM/IN products follow protocol. Repeat and infuse if long-acting opioid persists.	No absolute contraindication in life-threatening toxicity. Caution physical dependence and cardiovascular disease.	Reverses opioid analgesia and may precipitate withdrawal.	Acute pain, agitation, vomiting, sweating and tachycardia. Serious: pulmonary oedema, severe withdrawal, arrhythmia and seizures.	Airway/ventilation comes first. Titrate to adequate breathing, not necessarily full alertness. Observe for renarcotisation; place laterally if vomiting and document total dose/response.

Antiseizure Medicines and Status Epilepticus

Medicine	PD/PK	Indications and common dosage examples	Contraindications/precautions	Interactions	Side/adverse effects	Nursing care
Diazepam	Enhances GABA-A chloride-channel activity; rapid CNS entry after IV, followed by redistribution; long active metabolites.	Convulsive status epilepticus, severe spasm and selected withdrawal. Adult status dose often 10 mg IV slowly, repeat once after 5–10 minutes if protocol permits; rectal route when IV unavailable.	Severe respiratory insufficiency, sleep apnoea, myasthenia gravis; caution shock, pregnancy and elderly.	Opioids/alcohol/other sedatives cause profound respiratory depression; CYP inhibitors prolong effect.	Drowsiness, ataxia, hypotension. Serious: apnoea, aspiration and paradoxical agitation.	Time seizure, protect airway, oxygen/suction/ventilation ready, monitor RR/SpO2/BP. Do not inject rapidly. Treat underlying glucose/electrolyte cause.
Midazolam	Short-acting GABA-A modulator; rapid absorption by buccal, intranasal and IM routes; CYP3A metabolism.	Status epilepticus without IV access. Adult protocols commonly use 10 mg buccal or IM; IV dosing is smaller and titrated.	As for benzodiazepines; use caution with severe liver disease.	Strong CYP3A inhibitors and sedatives increase/prolong effect.	Respiratory depression, hypotension, amnesia and paradoxical agitation.	Confirm concentration/route because preparations differ. Monitor ventilation continuously after parenteral administration and document seizure cessation time.
Phenytoin/fosphenytoin	Use-dependent voltage-gated sodium-channel blockade. Phenytoin has nonlinear hepatic kinetics, high protein binding and many interactions; fosphenytoin is a water-soluble prodrug.	Second-line status and focal/generalised tonic-clonic seizure prevention. Loading often 20 mg/kg IV; phenytoin maximum rate commonly 50 mg/min in adults. Fosphenytoin is prescribed in phenytoin equivalents.	Sinus bradycardia, SA block and high-grade AV block for IV phenytoin. Caution hepatic disease, low albumin and pregnancy.	Potent enzyme inducer; interacts with warfarin, contraceptives, antiretrovirals and many drugs. Valproate alters free concentration.	Nystagmus, ataxia, gingival hyperplasia and rash. Serious: hypotension/arrhythmia with rapid IV use, severe skin reaction, DRESS and purple-glove syndrome.	Continuous ECG/BP during loading; large patent vein and normal saline compatibility only for phenytoin. Monitor level with albumin context, CBC/liver function, skin and oral hygiene.
Levetiracetam	Binds synaptic vesicle protein SV2A, modulating neurotransmitter release. Minimal metabolism/interactions; mainly renal elimination.	Broad-spectrum seizure treatment and status second-line. Status loading commonly 60 mg/kg IV, maximum 4.5 g; maintenance is renal-adjusted.	Hypersensitivity; caution renal failure and psychiatric history.	Few major pharmacokinetic interactions; additive sedation.	Somnolence, dizziness and irritability. Serious: aggression, psychosis, suicidality and rare severe skin reaction.	Calculate weight-based loading, adjust renal maintenance, monitor behaviour/mood and seizure control.
Sodium valproate	Increases GABA and blocks sodium/calcium channels. Highly protein-bound, hepatic metabolism and enzyme inhibition.	Broad-spectrum epilepsy and status. IV loading commonly 40 mg/kg, maximum 3 g under protocol; oral dose individualised.	Pregnancy in women/girls unless stringent specialist pregnancy-prevention conditions; liver disease, mitochondrial/POLG disorders and urea-cycle defects.	Inhibits lamotrigine metabolism, increasing severe-rash risk; interacts with warfarin and other antiseizure medicines.	Tremor, weight gain, GI upset and hair change. Serious: hepatotoxicity, pancreatitis, thrombocytopenia, hyperammonaemic encephalopathy and major fetal harm.	Pregnancy status and counselling, liver/CBC monitoring, bleeding and abdominal pain. Measure ammonia for unexplained encephalopathy. Never stop abruptly without specialist direction.

Psychiatric and Sedative Medicines

Class/example	PD/PK	Indications and common dose	Contraindications/precautions	Interactions	Side/adverse effects	Nursing responsibilities
Haloperidol	D2 receptor antagonist; hepatic CYP metabolism and long variable half-life.	Acute severe agitation/delirium and psychosis when non-drug de-escalation is insufficient. Adult acute doses often 0.5–5 mg oral/IM, lower in older/frail patients; repeat by protocol.	Parkinson/Lewy body disease, coma/CNS depression, significant QT prolongation. Caution epilepsy and electrolyte disturbance.	Other QT-prolongers, CYP inhibitors and levodopa; sedatives increase CNS depression.	Akathisia, dystonia and parkinsonism. Serious: torsades, neuroleptic malignant syndrome, tardive dyskinesia and aspiration from oversedation.	Use least restrictive care and document indication. Baseline ECG/electrolytes when feasible, monitor temperature/rigidity/consciousness. Treat acute dystonia promptly by protocol.
Olanzapine	Antagonises dopamine D2 and serotonin 5-HT2A plus histamine/muscarinic receptors; hepatic metabolism.	Schizophrenia, mania and selected acute agitation. Oral often 5–10 mg daily; IM acute dose commonly 5–10 mg under protocol.	Caution severe CNS depression, metabolic disease and elderly dementia-related psychosis.	Avoid close parenteral coadministration with benzodiazepines because of cardiorespiratory depression. Smoking induces metabolism.	Sedation, weight gain, orthostasis and anticholinergic effects. Serious: hyperglycaemia/DKA, NMS and severe hypotension.	Monitor consciousness, airway, BP, glucose, weight/lipids long-term. Use IM separation rules and observe closely.
Fluoxetine	Selective serotonin reuptake inhibitor; very long half-life and active metabolite; potent CYP2D6 inhibitor.	Depression, OCD and selected anxiety/bulimia. Common adult start 20 mg once daily; therapeutic effect develops over weeks.	Concurrent/recent MAOI; caution bipolar disorder, epilepsy, bleeding risk and hyponatraemia.	MAOIs/linezolid and other serotonergic drugs cause serotonin syndrome; NSAIDs/anticoagulants increase bleeding.	Nausea, insomnia, sexual dysfunction and initial anxiety. Serious: serotonin syndrome, hyponatraemia, mania, suicidality early in therapy and bleeding.	Assess suicide risk, mood activation and sodium risk. Explain delayed benefit and not to stop abruptly. Monitor for clonus, hyperreflexia, fever and agitation.
Amitriptyline	Inhibits serotonin/noradrenaline reuptake; strong anticholinergic, antihistamine and alpha-blocking effects; hepatic metabolism.	Depression and low-dose neuropathic pain. Depression often starts 25–50 mg at night; neuropathic pain often 10–25 mg at night, titrated.	Recent MI, arrhythmia/conduction disease, angle-closure glaucoma, urinary retention and MAOI use. High toxicity in overdose.	Alcohol/sedatives, anticholinergics, serotonergic and QT-prolonging drugs.	Dry mouth, constipation, blurred vision, sedation and orthostasis. Overdose causes coma, seizures, hypotension and wide-complex arrhythmia.	Suicide/overdose-risk assessment; ECG in risk groups. In overdose continuous ECG, bicarbonate protocol and urgent toxicology care; do not induce vomiting.
Lorazepam	GABA-A positive modulator; intermediate action and hepatic conjugation without long active metabolites.	Acute anxiety, alcohol withdrawal, catatonia and status. Doses are indication-specific; agitation/catatonia commonly 1–2 mg oral/IM/IV with reassessment.	Severe respiratory insufficiency, myasthenia gravis and sleep apnoea; caution elderly and substance use.	Opioids/alcohol/sedatives increase fatal respiratory depression.	Sedation, falls, amnesia and dependence. Serious: apnoea, hypotension and paradoxical disinhibition.	Respiratory and sedation monitoring, falls prevention, short-duration plan and withdrawal prevention. Never use chemical restraint without indication and observation.

Parkinsonism, Migraine and Neuromuscular Medicines

Medicine	PD/PK	Indication/dose	Contraindications/interactions	Adverse effects	Nursing care
Levodopa/carbidopa	Levodopa crosses BBB and becomes dopamine; carbidopa blocks peripheral conversion. Short plasma half-life causes wearing-off.	Parkinson motor symptoms. Common starting combinations provide levodopa 100 mg/carbidopa 25 mg three times daily, individualised.	Non-selective MAOI use, narrow-angle glaucoma caution. High-protein meals and iron reduce absorption; dopamine antagonists oppose effect.	Nausea, orthostasis, dyskinesia, hallucinations and impulse-control problems; abrupt withdrawal can cause hyperpyrexia-rigidity syndrome.	Give on time—late doses cause immobility/aspiration. Monitor BP, swallowing, falls and mental state. Do not stop abruptly.
Sumatriptan	5-HT1B/1D agonist constricts cranial vessels and inhibits trigeminal transmission; rapid SC and oral action, hepatic metabolism.	Acute migraine. Adult oral 50–100 mg once, may repeat after 2 hours within product maximum; SC dose differs.	Ischaemic heart/cerebrovascular disease, uncontrolled hypertension, hemiplegic/brainstem migraine. Do not combine with ergot or another triptan within 24 h.	Tingling, flushing, chest pressure. Serious: coronary vasospasm, MI, stroke and serotonin syndrome.	Confirm migraine diagnosis and vascular history. Escalate new neurological deficit or persistent chest pain; monitor overuse headache.
Neostigmine	Reversible acetylcholinesterase inhibitor increases acetylcholine at neuromuscular and muscarinic synapses; does not cross BBB well.	Reversal of non-depolarising blockade and specialist myasthenia use. Dose is weight/indication-based and administered with an antimuscarinic for reversal.	Mechanical GI/urinary obstruction and peritonitis. Caution asthma, bradycardia and peptic ulcer.	Beta-blockers worsen bradycardia; other cholinergic drugs increase toxicity.	Salivation, diarrhoea, sweating, bradycardia and bronchospasm; cholinergic crisis causes weakness and respiratory failure.	Continuous ECG/ventilation readiness, distinguish myasthenic from cholinergic deterioration, have atropine/glycopyrrolate as prescribed.

Nervous System Medicine Nursing Care Plan

Nursing problem	Expected outcome	Interventions and rationales	Evaluation
Acute pain	Meaningful pain reduction without respiratory or haemodynamic compromise.	Assess pain type/severity and red flags; use multimodal plan; reassess after each medicine; monitor sedation/RR with opioids; prevent constipation/nausea.	Pain and function improve; RR and alertness remain safe.
Risk for injury from seizure/sedation	No fall, aspiration or trauma.	Seizure precautions, low bed, suction/oxygen readiness, lateral positioning, timed observations and supervised mobility. Do not restrain convulsions or insert objects in mouth.	No injury; airway maintained; seizure duration documented.
Disturbed thought processes/agitation	Patient and others remain safe with least restrictive intervention.	Assess delirium causes, glucose/oxygenation, pain and substances; calm environment and verbal de-escalation; medicines only when indicated; ECG/airway monitoring after sedation.	Reduced agitation without oversedation; cause addressed.
Knowledge deficit	Patient explains dosing, adherence and red flags.	Teach-back about slow titration, no abrupt antiseizure/benzodiazepine/levodopa withdrawal, driving/fall precautions, pregnancy planning and interaction avoidance.	Accurate plan and follow-up demonstrated.

Authoritative Sources

Nervous System Medicines: Classes, Emergency Uses and Safety Read More »

Endocrine Medicines: Classes, Mechanisms, Emergency Uses and Safety

Why this topic matters in emergency medical care

Hormones regulate glucose, blood pressure, temperature, fluid balance, calcium, stress responses, growth and reproduction. A small error with an endocrine medicine can therefore produce rapid neurological, cardiovascular or metabolic deterioration. The emergency medical technician (EMT) must recognise endocrine patterns early, obtain a safe medication history, perform immediate supportive care, prevent avoidable harm and communicate clearly with the receiving team.

This lesson develops the pharmacology behind common endocrine medicines and links each class to practical pre-hospital and emergency-department decisions. It is an educational guide for supervised practice; follow the current Uganda Ministry of Health guidance, facility protocols, prescriber instructions and medicine-specific product information.

Learning outcomes

By the end of this lesson, the learner should be able to:

Explain how the hypothalamus, pituitary, thyroid, parathyroids, adrenals, pancreas and gonads coordinate endocrine function.
Classify endocrine medicines by hormone replaced, receptor targeted, enzyme inhibited or metabolic pathway changed.
Compare insulin preparations, non-insulin glucose-lowering medicines and emergency glucose-raising medicines.
Recognise and initially manage hypoglycaemia, diabetic ketoacidosis (DKA), hyperosmolar hyperglycaemic state (HHS), thyroid storm, myxoedema coma, adrenal crisis and severe hypercalcaemia.
Apply safe principles of dose checking, route selection, preparation, administration, monitoring, documentation and handover.
Identify contraindications, interactions, high-risk populations and medicines that must not be stopped abruptly.
Use structured clinical reasoning in realistic EMT scenarios and answer examination-style revision questions.

1. Endocrine physiology and medicine targets

The endocrine system communicates through hormones released into the bloodstream. Peptide hormones (for example insulin, glucagon and antidiuretic hormone) usually bind cell-surface receptors and act quickly. Steroid hormones (for example cortisol, aldosterone and sex hormones) cross cell membranes and alter gene transcription. Thyroid hormones enter cells and change metabolic activity over hours to days. Pharmacological treatment may replace a deficient hormone, mimic or block a hormone, alter its synthesis, change receptor signalling or remove an excess effect.

Gland or axis	Major hormones	Core physiological effects	Emergency relevance
Hypothalamus–pituitary	CRH, TRH, GnRH, GHRH, ACTH, TSH, LH, FSH, GH, prolactin; ADH from posterior pituitary	Controls downstream glands, growth, reproduction, water balance and stress response	Pituitary failure can cause adrenal insufficiency, hyponatraemia, hypoglycaemia and altered consciousness.
Thyroid	Thyroxine (T4), triiodothyronine (T3), calcitonin	Sets basal metabolic rate, heat production, cardiac sensitivity to catecholamines and bone turnover	Excess may cause thyroid storm; severe deficiency may cause myxoedema coma, hypothermia and bradycardia.
Parathyroids	Parathyroid hormone (PTH)	Raises serum calcium, activates vitamin D and increases renal calcium conservation	Hypercalcaemia can cause dehydration, confusion, arrhythmia and renal injury; hypocalcaemia can cause tetany or seizures.
Adrenal cortex	Cortisol, aldosterone, adrenal androgens	Stress adaptation, vascular tone, glucose availability, sodium retention and potassium excretion	Adrenal crisis presents with shock, vomiting, abdominal pain, hypoglycaemia and electrolyte disturbance.
Adrenal medulla	Adrenaline and noradrenaline	Rapid sympathetic response: heart rate, contractility, vasoconstriction and bronchodilation	These drugs are life-saving when correctly indicated but can cause severe tachyarrhythmia or ischaemia if misused.
Pancreatic islets	Insulin, glucagon, somatostatin	Balances glucose storage, mobilisation and nutrient metabolism	Insulin excess causes hypoglycaemia; insulin deficiency causes DKA or HHS.
Bone–kidney–vitamin D axis	Calcium, phosphate, vitamin D, PTH	Maintains neuromuscular function and skeletal mineralisation	Calcium abnormalities may produce weakness, paraesthesia, seizures or ECG changes.

EMT safety rule: an endocrine medicine may correct a laboratory value while worsening the patient’s immediate physiology. Always reassess airway, breathing, circulation, mental status, temperature, glucose, ECG and perfusion before and after giving or withholding a medicine.

2. General principles of endocrine pharmacology

2.1 Replacement, suppression and receptor modification

Replacement: insulin for absolute insulin deficiency, levothyroxine for thyroid hormone deficiency and hydrocortisone for cortisol deficiency.
Suppression or blockade: antithyroid medicines reduce new thyroid hormone synthesis; glucocorticoid antagonists block cortisol effects; somatostatin analogues suppress selected pituitary and gastrointestinal hormones.
Receptor or pathway modification: GLP-1 receptor agonists increase glucose-dependent insulin secretion and reduce appetite; SGLT2 inhibitors promote urinary glucose loss; bisphosphonates reduce osteoclast activity.
Emergency antagonism or rescue: glucagon and concentrated glucose reverse severe hypoglycaemia; calcium may stabilise the myocardium in selected hyperkalaemic or hypocalcaemic emergencies.

2.2 Pharmacokinetics that change emergency decisions

Principle	What it means	Why the EMT cares
Onset and peak	Time until an effect begins and reaches its maximum	Rapid-acting insulin can cause early hypoglycaemia; long-acting insulin may continue acting after the patient appears improved.
Half-life and duration	Time for concentration to fall and clinical effect to wear off	Recurrent hypoglycaemia may occur after sulfonylurea or long-acting insulin exposure.
Route and bioavailability	Amount reaching systemic circulation depends on IV, IM, subcutaneous, oral or enteral delivery	Shock, vomiting or poor perfusion can make oral or subcutaneous absorption unreliable.
Protein binding and distribution	Only unbound drug is readily active; altered albumin or fluid status changes distribution	Critical illness and kidney disease can increase toxicity from highly protein-bound or renally cleared medicines.
Hepatic metabolism	Liver enzymes transform many medicines before elimination	Severe hepatic disease may prolong effects and increase hypoglycaemia risk.
Renal clearance	Kidneys excrete drug or active metabolites	Insulin, metformin metabolites and several glucose-lowering medicines require extra caution in kidney impairment.

3. Endocrine medicines: a practical classification

Group	Representative medicines	Main emergency or clinical use	High-risk problem
Insulins	Regular/soluble, NPH, glargine, detemir, degludec, lispro, aspart	Type 1 diabetes, selected type 2 diabetes, DKA and HHS protocols	Hypoglycaemia, hypokalaemia, wrong product or wrong timing
Insulin secretagogues	Gliclazide, glimepiride, glibenclamide	Type 2 diabetes when pancreatic beta cells still produce insulin	Prolonged or recurrent hypoglycaemia, especially in older adults or renal disease
Insulin sensitiser	Metformin	First-line type 2 diabetes therapy in many patients	Lactic acidosis risk in severe hypoxia, shock, sepsis or renal failure
Incretin-based medicines	GLP-1 receptor agonists; DPP-4 inhibitors	Glucose control with low hypoglycaemia risk when used alone	Vomiting, dehydration, pancreatitis warning symptoms or delayed gastric emptying
SGLT2 inhibitors	Dapagliflozin, empagliflozin, canagliflozin	Type 2 diabetes; cardio-renal benefit in selected patients	Euglycaemic DKA, dehydration, genital infection and peri-operative risk
Thyroid replacement	Levothyroxine; liothyronine in selected specialist situations	Hypothyroidism and myxoedema coma protocols	Over-replacement may precipitate angina, atrial fibrillation or thyroid storm.
Antithyroid medicines	Propylthiouracil, methimazole/carbimazole, iodide	Thyrotoxicosis and thyroid storm treatment plans	Agranulocytosis, hepatotoxicity, and incorrect timing of iodide
Adrenal replacement	Hydrocortisone, prednisolone, fludrocortisone	Adrenal insufficiency and adrenal crisis	Failure to stress-dose can be fatal; abrupt chronic steroid withdrawal is dangerous.
Calcium and vitamin D medicines	Calcium gluconate, calcium chloride, calcitriol, cholecalciferol	Hypocalcaemia, tetany, selected cardiac membrane-stabilisation indications	Extravasation injury, arrhythmia or hypercalcaemia
Bone medicines	Bisphosphonates, denosumab	Hypercalcaemia of malignancy and osteoporosis management	Renal injury, hypocalcaemia, oesophageal irritation or jaw osteonecrosis

4. Insulin preparations and safe insulin practice

Insulin lowers plasma glucose by increasing cellular glucose uptake and reducing hepatic glucose production. It also shifts potassium into cells. This is why insulin is life-saving in DKA but can produce dangerous hypoglycaemia or hypokalaemia if glucose and electrolytes are not monitored. Insulin is a high-alert medicine: verify the product, concentration, dose, route, timing, patient identity and recent glucose before administration.

Insulin category	Examples	Typical profile (approximate)	Clinical teaching point
Rapid-acting analogue	Lispro, aspart, glulisine	Onset about 10–20 min; short duration	Usually coordinated with meals; hypoglycaemia occurs if food is delayed or missed.
Short-acting soluble human insulin	Regular insulin	Slower onset than analogues; can be used IV in monitored DKA protocols	Only use IV regular insulin when the local protocol and trained clinician specify it.
Intermediate-acting	NPH/isophane	Distinct peak; longer duration	Peak-related hypoglycaemia may occur overnight or between meals.
Long-acting basal	Glargine, detemir, degludec	Flat or near-flat basal effect; long duration	Do not mix glargine or detemir in the same syringe; never omit basal insulin in type 1 diabetes without specialist direction.
Premixed formulations	Human or analogue combinations	Fixed basal and meal components	Less flexible when meal size or timing changes; confirm the exact mixture.

4.1 Insulin administration checklist

Confirm the order: insulin name, concentration (for example U-100), dose, route, timing and indication.
Identify the patient: use two identifiers and ask about allergies, diabetes type, last meal and last insulin dose.
Check the product: inspect expiry, appearance and storage. Cloudiness is expected for some suspensions such as NPH but not for clear soluble insulin.
Check glucose and ketones: document capillary glucose; obtain ketones when DKA is possible and the equipment/protocol is available.
Check potassium and renal status in monitored care: insulin can worsen hypokalaemia; severe hypokalaemia generally requires correction before insulin in DKA protocols.
Use the correct device: an insulin syringe or pen marked in insulin units. Never estimate units with a non-insulin syringe.
Administer and observe: use correct subcutaneous sites and rotate them; IV insulin requires a pump or controlled infusion and independent double-check.
Reassess: repeat glucose at the protocol interval, watch for sweating, tremor, confusion, weakness, seizures or arrhythmia, and document response.

“RIGHT INSULIN” safety mnemonic

Recheck patient and prescription · Insulin name and concentration · Glucose/ketones · Hypokalaemia risk · Timing with food

Insulin device · Needle/site · Second checker for high-alert doses · Understand onset/peak · Look for hypoglycaemia · Inform and document · Next glucose check

5. Non-insulin glucose-lowering medicines

Class	How it works	Benefits	Important adverse effects and emergency cautions
Metformin (biguanide)	Reduces hepatic gluconeogenesis and improves insulin sensitivity	Effective, inexpensive and does not usually cause hypoglycaemia alone	Gastrointestinal upset; hold or seek prescriber review in shock, severe hypoxia, sepsis, acute kidney injury or major contrast-related risk because lactic acidosis is uncommon but serious.
Sulfonylureas	Stimulate pancreatic beta-cell insulin release regardless of current glucose	Lower glucose rapidly and are widely available	Prolonged hypoglycaemia; risk rises with missed meals, renal/hepatic impairment, alcohol or older age. Recurrent episodes need observation and medical review.
DPP-4 inhibitors	Prolong endogenous incretin action and glucose-dependent insulin secretion	Low hypoglycaemia risk when used alone; oral dosing	Dose adjustment may be needed in kidney disease; assess for pancreatitis symptoms and drug interactions.
GLP-1 receptor agonists	Increase glucose-dependent insulin, reduce glucagon, slow gastric emptying and increase satiety	Good glucose and weight effects; low hypoglycaemia risk without insulin or secretagogue	Nausea/vomiting and dehydration; consider aspiration risk from delayed gastric emptying. Severe persistent abdominal pain requires urgent assessment.
SGLT2 inhibitors	Reduce proximal renal glucose reabsorption, causing glucosuria and mild natriuresis	Cardio-renal benefits in selected patients	Genital/urinary infections, volume depletion and euglycaemic DKA. A near-normal glucose does not exclude DKA in a patient taking an SGLT2 inhibitor.
Thiazolidinediones	Activate PPAR-gamma and improve insulin sensitivity	Durable insulin-sensitising effect	Fluid retention, weight gain and heart-failure worsening; not an acute rescue medicine.
Alpha-glucosidase inhibitors	Delay intestinal carbohydrate breakdown and absorption	Reduce post-meal glucose rise	Flatulence and diarrhoea; if hypoglycaemia occurs with another medicine, use glucose rather than sucrose.

6. Hypoglycaemia: recognise, treat and prevent recurrence

Hypoglycaemia is a time-critical glucose emergency. Symptoms result from autonomic activation and inadequate glucose delivery to the brain: sweating, tremor, palpitations, hunger, anxiety, irritability, confusion, abnormal behaviour, seizures and coma. In a patient with altered mental status, check glucose early, but do not delay airway and breathing support.

Patient state	Immediate approach	Examples of treatment	Reassessment
Awake, protecting airway, able to swallow	Give fast-acting oral carbohydrate; do not give food or drink to a drowsy patient.	Glucose gel/tablets or a measured sugary drink according to local protocol; follow with longer-acting carbohydrate once recovered.	Recheck glucose after about 10–15 minutes; repeat treatment if still low, then investigate cause.
Confused, seizing, unconscious or unsafe swallow	Place in recovery position if breathing, suction as needed, give oxygen when indicated, obtain IV/IO access and call for advanced support.	IV dextrose/glucose using local concentration and dose, or IM/SC glucagon when IV access is delayed or unavailable and the protocol permits.	Recheck frequently; protect against recurrent hypoglycaemia, especially after sulfonylurea or long-acting insulin.
Persistent or recurrent episodes	Search for medication error, renal failure, sepsis, liver failure, adrenal insufficiency, starvation or alcohol.	May require dextrose infusion, prolonged observation and specialist treatment.	Document times, measured values, treatment and response; provide prevention education before discharge.

Never “feed” an unconscious patient. Oral fluids or sugar can be aspirated. Protect the airway, use a suitable parenteral rescue medicine under protocol and reassess continuously.

7. Diabetic ketoacidosis (DKA) and hyperosmolar hyperglycaemic state (HHS)

DKA results from insufficient effective insulin with increased ketone production and metabolic acidosis. HHS is dominated by extreme hyperglycaemia, hyperosmolality and profound dehydration with little or no significant ketosis. They can overlap. Infection, missed insulin, myocardial infarction, stroke, pancreatitis, corticosteroids, new diabetes and SGLT2 inhibitors are important triggers.

Feature	DKA	HHS	EMT implication
Typical onset	Hours to a few days	Days to weeks	Do not dismiss gradual confusion or dehydration as simple weakness.
Glucose	Raised, but may be only moderately elevated in euglycaemic DKA	Usually very high	Use ketones and clinical context; glucose alone cannot exclude DKA.
Ketones/acidosis	Prominent ketonaemia and metabolic acidosis	Minimal ketones; hyperosmolality dominates	Check capillary ketones if available and report results.
Neurology	Alertness varies; Kussmaul breathing may occur	Marked confusion, seizures or coma more common	Assess GCS/AVPU, airway, aspiration risk and stroke mimics.
Fluid deficit	Substantial	Often extreme	Establish IV access, monitor perfusion and follow a controlled fluid protocol; beware heart or kidney failure.

7.1 Pre-hospital priorities

Perform an ABCDE assessment, check glucose, temperature, mental status, respiratory pattern, blood pressure, pulse and oxygen saturation.
Look for triggers: infection, missed insulin, medication change, pregnancy, chest pain, stroke symptoms, abdominal pain, vomiting or SGLT2-inhibitor use.
Establish IV access where trained and permitted; obtain ECG and monitor rhythm if available.
Begin isotonic fluid resuscitation only according to local protocol and reassess frequently, particularly in older adults, heart failure or kidney disease.
Do not give an insulin bolus casually. DKA insulin therapy requires potassium assessment, controlled infusion and serial laboratory monitoring.
Transport urgently to a facility able to measure electrolytes, venous/arterial blood gas, ketones, renal function and osmolality.

8. Thyroid medicines

8.1 Levothyroxine and thyroid hormone replacement

Levothyroxine is synthetic T4. Peripheral tissues convert T4 to the active hormone T3. It is usually taken orally on an empty stomach at a consistent time. Absorption falls when taken with iron, calcium, antacids, some binding agents or certain foods. A patient who suddenly develops palpitations, chest pain, tremor, sweating or confusion after a dose change may be over-replaced or developing another acute illness.

Do not use a normal thyroid-stimulating hormone (TSH) value as an immediate measure of response in a critically ill patient; clinical context and free hormone results guide specialist decisions.
Older adults and people with coronary disease usually require cautious dose increases because thyroid hormone raises myocardial oxygen demand and can precipitate angina or atrial fibrillation.
In suspected myxoedema coma, airway support, active but controlled warming, glucose assessment, infection search and stress-dose corticosteroid coverage are priorities alongside specialist thyroid replacement.

8.2 Antithyroid medicines

Medicine/class	Mechanism	Uses	Safety warnings
Methimazole/carbimazole	Inhibits thyroid peroxidase, reducing organification and coupling	Most non-pregnancy thyrotoxicosis; specialist treatment plans	Fever or sore throat may indicate agranulocytosis; jaundice or dark urine may indicate liver injury. Seek urgent review.
Propylthiouracil (PTU)	Inhibits thyroid peroxidase and reduces peripheral T4-to-T3 conversion	Selected thyroid storm protocols and some pregnancy situations under specialist direction	Severe hepatotoxicity risk; do not substitute without prescriber guidance.
Iodide (potassium iodide or Lugol solution)	Rapidly inhibits thyroid hormone release and organification after an antithyroid drug	Thyroid storm or pre-operative preparation in selected protocols	Timing matters: giving iodide before blocking synthesis can provide substrate for new hormone production.
Beta-blocker	Controls adrenergic manifestations; propranolol also reduces T4-to-T3 conversion at higher doses	Tremor, tachycardia and hypertension in thyrotoxicosis	Bronchospasm, bradycardia, heart failure or shock may make it unsafe; treat the physiology, not just the pulse.

9. Thyroid emergencies

9.1 Thyroid storm

Thyroid storm is decompensated thyrotoxicosis with fever, marked tachycardia, agitation or delirium, gastrointestinal symptoms, heart failure or shock. It is commonly triggered by infection, surgery, trauma, childbirth, stopping antithyroid medication or iodine exposure. There is no single bedside test that confirms it immediately; treat the clinical syndrome while seeking expert help.

ABCDE assessment, cardiac monitoring, IV access, glucose, temperature, ECG and urgent transport.
Support oxygenation and circulation; use cautious fluids if heart failure is present and treat severe hyperthermia with cooling measures.
Search for and treat the trigger, especially infection, myocardial infarction, pulmonary embolism or medication interruption.
Specialist therapy commonly combines an antithyroid medicine, then iodide after an appropriate interval, a beta-blocker when haemodynamically safe, and glucocorticoid support.
Avoid aspirin for fever in suspected thyroid storm unless specifically directed, because it can increase free thyroid hormone; use local antipyretic guidance.

9.2 Myxoedema coma

Myxoedema coma is severe decompensated hypothyroidism, often precipitated by infection, cold exposure, sedatives, stroke, trauma or stopping thyroid replacement. Patients may have hypothermia, bradycardia, hypotension, hypoventilation, hyponatraemia, hypoglycaemia and reduced consciousness; the name is misleading because many are not literally comatose.

Protect the airway early; hypoventilation and carbon dioxide retention may be prominent.
Handle gently and avoid rapid peripheral warming that can worsen vasodilation and hypotension.
Check glucose immediately and correct hypoglycaemia; obtain ECG and electrolytes.
Give stress-dose hydrocortisone when adrenal insufficiency cannot be excluded, then specialist-directed thyroid hormone replacement.
Look for infection even without fever; severe hypothyroidism can blunt the inflammatory response.

10. Adrenal medicines and corticosteroid safety

10.1 Corticosteroid classes

Medicine	Relative glucocorticoid effect	Mineralocorticoid effect	Practical use
Hydrocortisone	Short-acting, physiologic replacement and stress dosing	Meaningful	Preferred emergency medicine for suspected adrenal crisis in many protocols.
Prednisolone/prednisone	Intermediate-acting	Lower than hydrocortisone	Chronic replacement or inflammatory disease; conversion must be prescribed.
Dexamethasone	Long-acting and potent	Minimal	Useful when a glucocorticoid effect is needed without mineralocorticoid activity; specialist selection matters.
Fludrocortisone	Minimal glucocorticoid effect	Strong	Mineralocorticoid replacement in primary adrenal insufficiency; monitor blood pressure and electrolytes.

10.2 Adrenal crisis

Adrenal crisis is inadequate cortisol during physiological stress. Suspect it in a person with known adrenal insufficiency, chronic steroid use, pituitary disease or recent steroid withdrawal who develops unexplained hypotension, collapse, vomiting, abdominal pain, weakness, confusion, fever, hypoglycaemia or hyponatraemia. Primary disease may also cause hyperkalaemia and skin hyperpigmentation.

Clinical reasoning example

A patient with Addison disease has diarrhoea, vomiting and dizziness after several days of infection. The key danger is not simply dehydration: the patient cannot absorb oral hydrocortisone and may have lost the cortisol surge required to maintain vascular tone. Give emergency parenteral hydrocortisone under protocol, begin supportive resuscitation and arrange immediate hospital care.

Call for advanced help and perform ABCDE; place the patient supine if tolerated and monitor ECG, blood pressure, glucose and temperature.
Give parenteral hydrocortisone immediately when adrenal crisis is suspected according to the authorised local dose and route. Do not delay for cortisol results.
Give isotonic fluid for shock, reassessing lungs, perfusion and urine output; add dextrose when hypoglycaemia is present.
Search for triggers such as infection, gastroenteritis, trauma, surgery, missed doses or abrupt steroid cessation.
Communicate the last steroid dose, emergency injection, fluid volume, glucose trend, blood pressure and response during handover.

Never stop long-term systemic corticosteroids abruptly. Suppression of the hypothalamic–pituitary–adrenal axis can persist after the original illness improves. Tapering and stress-dose plans must be clinician-directed.

11. Calcium, vitamin D and bone medicines

Medicine/class	Mechanism or purpose	Emergency relevance	Key precautions
Calcium gluconate	Raises extracellular calcium and stabilises excitable membranes	Symptomatic hypocalcaemia; selected hyperkalaemia or calcium-channel-blocker toxicity protocols	Continuous ECG and local protocol; extravasation can injure tissue.
Calcium chloride	More elemental calcium per volume than gluconate	Selected resuscitation or toxicology indications under advanced protocols	Prefer a secure central line when required; severe extravasation risk.
Vitamin D/calcitriol	Improves intestinal calcium absorption; calcitriol acts rapidly	Chronic deficiency or hypoparathyroidism management	Overdose can cause hypercalcaemia, confusion, polyuria and renal injury.
Bisphosphonates	Inhibit osteoclast-mediated bone resorption	Hypercalcaemia of malignancy and skeletal disease; not immediate first-line resuscitation	Renal function, infusion rate and hypocalcaemia risk must be monitored.
Denosumab	Inhibits RANKL and osteoclast formation	Selected osteoporosis or malignancy indications	Delayed hypocalcaemia, especially with renal impairment; maintain follow-up.

12. Medication safety in endocrine emergencies

12.1 The endocrine medication history

Ask the exact medicine name, strength, formulation, route, usual time and last dose.
Ask about insulin pens, pumps, continuous glucose monitors, glucose tablets, glucagon kits, steroid cards or emergency injection kits.
Ask whether doses were missed, doubled, changed recently, vomited, taken with food or stopped because the patient felt better.
Identify over-the-counter products and supplements: calcium, iron, iodine-containing products, herbal remedies, weight-loss products and “energy” preparations.
Check pregnancy or breastfeeding, kidney/liver disease, heart failure, thyroid disease, adrenal disease, alcohol use and allergies.
Bring medicine containers, a photograph of the prescription or the patient’s treatment card to hospital when possible.

12.2 Look-alike and sound-alike risks

Risk	Example of error	Prevention
Units versus millilitres	Drawing up insulin units in a non-insulin syringe	Use the labelled insulin syringe/pen; independently verify concentration.
Product confusion	Mixing up rapid-acting and long-acting insulin	Read the label three times and use a second checker for high-alert doses.
Concentration confusion	Substituting U-200/U-300/U-500 for U-100 without recalculation	Use only the matching device and written prescription; never convert mentally during an emergency.
Route error	Giving concentrated calcium or IV insulin through an unsuitable route	Confirm route, line patency, dilution and monitoring requirements before administration.
Timing error	Giving iodide before an antithyroid drug in thyroid storm	Follow the sequence in the specialist protocol and document exact times.

13. Endocrine drug interactions

Combination or situation	Potential problem	Action for EMT/student
Insulin + alcohol or missed meal	Delayed or severe hypoglycaemia	Check glucose, ask about food and observe beyond the first improvement.
Insulin + beta-blocker	Beta-blockade may mask tremor and palpitations of hypoglycaemia	Rely on glucose measurement and neuroglycopenic signs, not pulse alone.
Levothyroxine + calcium/iron/antacids	Reduced absorption and apparent treatment failure	Ask about timing; refer for dose/spacing advice rather than doubling a dose.
Metformin + severe hypoxia/shock/acute kidney injury	Accumulation and lactic acidosis risk	Prioritise resuscitation and urgent clinician review; do not give extra doses.
SGLT2 inhibitor + fasting/infection/low-carbohydrate intake	Euglycaemic DKA	Check ketones and acid–base status when symptoms fit, even if glucose is not extreme.
Glucocorticoid + insulin or sulfonylurea	Steroid-induced hyperglycaemia; later hypoglycaemia when steroid effect wanes	Trend glucose and communicate the steroid timing.
Amiodarone + thyroid disease/levothyroxine	Iodine load and thyroid dysfunction	Include amiodarone history in altered mental status, arrhythmia or thyroid presentations.
Warfarin + thyroid replacement changes	Changing thyroid state alters clotting-factor turnover	Check anticoagulant history and communicate recent thyroid medicine changes.

14. Special populations

Children: dosing is weight-based, glucose reserves are limited and cerebral injury from rapid osmotic shifts is a concern. Use paediatric protocols and never extrapolate adult doses.
Pregnancy: glucose targets, insulin needs and thyroid ranges change. Avoid unapproved medicines and seek obstetric/medical advice early.
Older adults: renal impairment, polypharmacy, frailty and atypical hypoglycaemia make conservative dosing and longer observation important.
Kidney disease: insulin clearance falls, increasing hypoglycaemia risk; fluid and potassium decisions must be individualised.
Liver disease: glycogen storage and drug metabolism are impaired; hypoglycaemia may be prolonged.
Heart failure: fluid resuscitation can precipitate pulmonary oedema; reassess lung sounds, work of breathing and perfusion after every bolus.
Adrenal insufficiency: vomiting or diarrhoea may make oral therapy ineffective; the emergency injection kit and steroid card are important safety tools.

15. Calculations and monitoring

15.1 Weight-based dose calculation

Required dose = prescribed dose per kilogram × patient weight in kilograms. Write the units at every step. If a 0.1 unit/kg/hour infusion is ordered for a 70 kg adult, the mathematical rate is 7 units/hour; the actual pump preparation and titration must follow the authorised DKA protocol.

For liquid medicines, volume (mL) = dose required ÷ concentration (mg/mL or units/mL). Confirm the concentration on the label before calculating. A second trained person should independently repeat high-alert calculations.

15.2 Monitoring matrix

Medicine/problem	Baseline checks	During therapy	Stop/escalate indicators
Insulin infusion	Glucose, potassium, renal function, ketones/acid-base status	Hourly glucose in many protocols, potassium and ketones at protocol intervals, fluid balance	Severe hypoglycaemia, falling potassium, worsening shock or unexpected acidosis
Hydrocortisone/adrenal crisis	Glucose, sodium, potassium, blood pressure, suspected trigger	Perfusion, glucose, electrolytes, mental status and response to fluids/steroid	Persistent shock, arrhythmia, refractory vomiting or deteriorating consciousness
Antithyroid treatment	Clinical severity, ECG, liver history, infection symptoms	Heart rate, temperature, mental status, liver function and blood counts under medical care	Agranulocytosis symptoms, liver failure signs, worsening storm or heart failure
Calcium infusion	ECG, calcium, magnesium, renal function and IV access	ECG, symptoms, infusion site and repeat calcium	Extravasation, bradyarrhythmia, hypercalcaemia or persistent tetany

16. Clinical scenarios for EMT learners

Scenario 1: Awake hypoglycaemia

A 24-year-old with type 1 diabetes is sweaty, trembling and able to swallow. Glucose is 2.6 mmol/L. Give fast-acting oral glucose, reassess after the local interval, then provide longer-acting carbohydrate and investigate missed meals or excess insulin. Do not allow immediate departure solely because the first reading improves.

Scenario 2: Unconscious after sulfonylurea

An older adult is found unconscious with a gliclazide packet nearby. Protect the airway, treat confirmed hypoglycaemia parenterally under protocol, obtain IV access and arrange prolonged observation because recurrent hypoglycaemia may outlast the initial glucose response.

Scenario 3: Euglycaemic DKA

A patient taking dapagliflozin has vomiting, abdominal pain, tachypnoea and glucose of 10.8 mmol/L. The near-normal glucose does not reassure you. Check ketones and acid–base status urgently, provide supportive care and transport for DKA management.

Scenario 4: DKA with potassium concern

A young person has Kussmaul breathing, dehydration and a high glucose. Insulin will lower glucose and shift potassium intracellularly. Do not improvise an insulin bolus; obtain ECG/electrolyte data and follow a controlled protocol with senior oversight.

Scenario 5: Thyroid storm

A febrile patient with known Graves disease has agitation, vomiting, atrial fibrillation and heart failure. Support oxygenation, monitor rhythm, treat hyperthermia and trigger, and seek urgent specialist therapy. A beta-blocker may be dangerous in shock or decompensated failure, so do not treat the heart rate in isolation.

Scenario 6: Adrenal crisis

A patient with chronic prednisolone use has collapse, abdominal pain, hypotension and low glucose after gastroenteritis. Suspect adrenal crisis, give emergency hydrocortisone under protocol without waiting for laboratory confirmation, treat shock and transfer urgently.

Scenario 7: Myxoedema coma

An elderly patient is cold, bradycardic, hypoventilating and confused after pneumonia. Check glucose, support ventilation, warm cautiously, seek hydrocortisone and thyroid replacement guidance, and avoid sedatives that worsen hypoventilation.

17. Documentation and handover

Record the patient’s baseline condition, medicine history, glucose/ketone readings, vital signs, ECG findings, allergies, suspected trigger, treatment, route, dose, batch or concentration where relevant, time given, response, adverse effects and receiving clinician. A concise handover should state:

Situation: the endocrine emergency suspected and the current threat.
Background: diabetes type, adrenal/thyroid disease, pregnancy, kidney disease and medication changes.
Assessment: airway, breathing, circulation, mental status, glucose, ketones, temperature, ECG and perfusion.
Recommendation: investigations or specialist support required, next glucose/ECG check and concerns about recurrence.

18. Common errors and how to correct them

Error	Why it is unsafe	Better practice
Giving oral sugar to an unconscious patient	Aspiration and airway obstruction	Airway protection and parenteral rescue medicine under protocol.
Using glucose alone to rule out DKA	Euglycaemic DKA can be missed	Ask about SGLT2 inhibitors and check ketones/acid–base status.
Starting insulin before considering potassium	Rapid intracellular shift can cause life-threatening hypokalaemia	Follow the DKA protocol and monitor ECG/electrolytes.
Stopping steroids when the patient improves	Adrenal crisis can recur and chronic therapy may have suppressed cortisol production	Continue the prescribed plan and arrange clinician-directed tapering.
Giving beta-blocker to every tachycardic thyrotoxic patient	May worsen shock, bronchospasm or decompensated heart failure	Assess perfusion, lung disease and ventricular function; involve senior clinician.
Repeating a long-acting insulin dose because glucose remains high	Delayed accumulation and later severe hypoglycaemia	Check timing, ketones, illness and prescribed correction plan.

19. Quick comparison of endocrine emergencies

Emergency	Clues	Immediate medicine/support principle	Major danger
Hypoglycaemia	Sweating, tremor, confusion, seizure, low glucose	Oral glucose if safe; IV/IM rescue if not; repeat measurements	Brain injury and recurrence
DKA	Polyuria, vomiting, abdominal pain, ketones, Kussmaul breathing	Fluids, controlled insulin and potassium management in hospital protocol	Acidosis, hypokalaemia, cerebral injury and shock
HHS	Profound dehydration, very high glucose/osmolality, altered mental status	Careful fluids, electrolyte management and controlled insulin	Thrombosis, seizures, cerebral oedema and cardiovascular collapse
Thyroid storm	Fever, agitation, tachyarrhythmia, GI symptoms, heart failure	Supportive care, antithyroid drug, delayed iodide, beta-blockade if safe, steroid	Arrhythmia, pulmonary oedema, shock
Myxoedema coma	Hypothermia, bradycardia, hypoventilation, confusion, hyponatraemia	Airway/ventilation, glucose, cautious warming, hydrocortisone and thyroid hormone	Respiratory failure and cardiovascular collapse
Adrenal crisis	Hypotension, vomiting, abdominal pain, hypoglycaemia, weakness	Immediate parenteral hydrocortisone, isotonic fluids and glucose when needed	Refractory shock and death
Severe hypocalcaemia	Perioral tingling, tetany, seizures, prolonged QT	ECG-monitored calcium replacement under protocol	Laryngospasm and ventricular arrhythmia

20. Revision questions

Why is insulin classified as a high-alert medicine?
Differentiate rapid-acting, short-acting, intermediate-acting and long-acting insulin.
Why can euglycaemic DKA occur with an SGLT2 inhibitor?
List five clinical signs of hypoglycaemia and explain why oral fluids are unsafe in an unconscious patient.
What are the three immediate priorities in a patient with suspected DKA?
Why must potassium be considered before or during insulin therapy for DKA?
Compare DKA and HHS in onset, ketones, neurological features and fluid deficit.
Explain the mechanism and major emergency warning of metformin.
What is the role of GLP-1 receptor agonists and what adverse effect can complicate emergency care?
Why can beta-blockers mask hypoglycaemia?
Describe the sequence and purpose of antithyroid drug, iodide, beta-blocker and steroid therapy in thyroid storm.
List five features of myxoedema coma.
Why is hydrocortisone given before or with thyroid hormone when myxoedema coma is suspected?
State the major signs of adrenal crisis and the first medicine that should not be delayed.
Explain the difference between glucocorticoid and mineralocorticoid effects.
Give four medication-history questions that can reveal an endocrine emergency trigger.
What are the main risks of IV calcium administration?
How should endocrine medicines be documented during handover?
Why are children, older adults, pregnant patients and people with kidney disease high-risk groups?
Write a safe plan for a patient who improves after hypoglycaemia but has taken a long-acting sulfonylurea.

21. Key takeaways

Endocrine medicines can rapidly alter consciousness, circulation, temperature, electrolytes and cardiac rhythm.
Glucose measurement is essential, but a normal or modest glucose does not exclude SGLT2-associated DKA.
Treat hypoglycaemia according to airway safety; oral carbohydrate is for an alert patient who can swallow.
DKA and HHS require controlled fluids, electrolyte assessment and protocol-driven insulin—not improvised boluses.
Thyroid storm and myxoedema coma are clinical emergencies: support ABCDE while arranging specialist treatment.
Suspected adrenal crisis is treated immediately with parenteral hydrocortisone and resuscitation; do not wait for laboratory confirmation.
Always verify units, concentration, route, timing, renal function, food intake, interactions and the next monitoring time.
Good documentation and handover prevent recurrence after the patient leaves the emergency scene.

22. Recommended references for further study

Clinical note: This lesson supports EMT learning and examination preparation. It does not replace an authorised prescription, local emergency protocol, senior clinical supervision or the patient’s individual treatment plan. In a deteriorating patient, stabilise ABCDE, call for advanced help and transfer urgently.

Complete Endocrine Pharmacology Tables

Dosage safety: The doses below are common adult teaching examples. The prescription, current Uganda Clinical Guidelines, product information and facility protocol take priority. Confirm age, weight, pregnancy, oral intake, renal/hepatic function, blood glucose, electrolytes and interacting medicines. Insulin doses are individualised and must not be copied from one patient to another.

Insulins and Emergency Glucose Medicines

Medicine	Pharmacodynamics and pharmacokinetics	Indications and common dosage guidance	Contraindications/precautions	Interactions	Side effects and serious adverse effects	Monitoring and nursing responsibilities
Regular soluble human insulin	PD: activates insulin receptors, increases cellular glucose uptake, suppresses hepatic glucose output, lipolysis and ketogenesis, and shifts potassium intracellularly. PK: SC onset about 30–60 minutes and duration 5–8 hours; IV action begins within minutes.	Type 1 diabetes, selected type 2 diabetes, DKA/HHS infusion and hyperkalaemia with glucose. Meal dosing is individualised. DKA commonly uses 0.1 units/kg/hour IV after fluid and potassium assessment, with protocol-directed variation; never give IV insulin outside an approved protocol.	Current hypoglycaemia. Caution with low potassium, renal/hepatic failure, poor intake and inability to monitor. In DKA, insulin may be delayed until potassium is safe.	Other glucose-lowering drugs increase hypoglycaemia. Beta-blockers may mask warning signs. Corticosteroids, thiazides and sympathomimetics raise glucose. Alcohol can cause delayed hypoglycaemia.	Hypoglycaemia, weight gain, injection-site reaction and lipohypertrophy. Serious: severe hypoglycaemia, hypokalaemia, seizures, coma and dosing errors.	Independent check of type, concentration and dose. Match SC administration to meal. Monitor glucose and potassium; rotate sites; never abbreviate units as U. In IV use, label line/pump and reassess hourly per protocol.
NPH/isophane insulin	Intermediate-acting suspension; SC onset about 1–2 hours, peak approximately 4–12 hours and duration roughly 12–18 hours, with major patient variation.	Basal coverage once or twice daily. Starting total insulin in insulin-naive adults is often individualised around 0.1–0.2 units/kg/day for basal therapy, then titrated to fasting glucose.	Hypoglycaemia. Caution with variable meals, nocturnal risk and renal decline.	Same glucose-altering interactions as other insulin.	Hypoglycaemia, especially at peak/nocturnally; weight gain and lipodystrophy.	Cloudy suspension: gently roll, do not shake vigorously. Verify timing/meal plan. If mixing with regular insulin, follow policy and draw clear before cloudy. Monitor overnight patterns.
Rapid-acting analogues Lispro, aspart	Rapid receptor action; SC onset about 10–20 minutes, peak 1–3 hours and duration 3–5 hours.	Prandial and correction insulin; pump therapy. Dose is carbohydrate-, glucose- and sensitivity-based; give immediately before or with food according to product plan.	Hypoglycaemia; do not give when meal availability is uncertain unless a specific post-meal plan exists.	As for insulin.	Rapid severe hypoglycaemia if food is delayed; hypokalaemia.	Confirm meal is present and patient can eat. Check glucose and carbohydrate plan. Distinguish from long-acting insulin to avoid look-alike errors.
Long-acting insulin Glargine, detemir	Provides relatively peakless basal insulin; glargine forms a SC depot. Duration about 20–24 hours or product-dependent.	Basal therapy once daily or product-specific schedule; titrate gradually to fasting glucose. Not for rapid correction or DKA infusion.	Hypoglycaemia. Do not mix glargine in the same syringe with other insulin.	As for insulin.	Hypoglycaemia, weight gain, injection reaction.	Give consistently at prescribed time. Verify that rapid-acting insulin was not substituted. Continue basal insulin in type 1 diabetes during illness unless specialist plan says otherwise.
Dextrose	Raises plasma glucose rapidly; IV hypertonic solutions have immediate effect but short duration if underlying insulin action persists.	Severe hypoglycaemia with IV access. Adult protocols commonly use 10–25 g IV glucose, selecting concentration/volume to reduce extravasation risk, followed by recheck and longer-acting carbohydrate when safe.	Hyperglycaemia. Concentrated preparations require secure IV access; caution fluid overload.	Persistent insulin or sulfonylurea action may cause recurrence.	Hyperglycaemia, phlebitis, tissue injury with extravasation and electrolyte shifts.	Check glucose when possible without delaying treatment. Confirm line patency; give per protocol; recheck after about 15 minutes and repeat/escalate. Identify cause and provide sustaining nutrition.
Glucagon	Stimulates hepatic glycogenolysis and gluconeogenesis. IM/SC effect usually within 10–15 minutes; ineffective when glycogen is depleted.	Severe hypoglycaemia when IV access is unavailable. Adult rescue commonly 1 mg IM/SC; paediatric dose is product/weight-based.	Phaeochromocytoma and insulinoma require specialist caution. May be ineffective after prolonged fasting, alcohol misuse or severe liver disease.	Beta-blockers may intensify BP/HR response; warfarin effect may increase rarely.	Nausea and vomiting. Rare hypertension, tachycardia or allergy.	Place unconscious patient laterally, protect airway, give rescue dose, obtain IV access and recheck glucose. Once awake, give carbohydrate and investigate recurrent hypoglycaemia.

Non-Insulin Diabetes Medicines

Class/example	PD/PK	Indications and common adult dose	Contraindications/precautions	Interactions	Side/adverse effects	Nursing care
Metformin	Reduces hepatic gluconeogenesis and improves insulin sensitivity; absorbed orally and excreted unchanged by kidneys.	First-line type 2 diabetes when appropriate. Common start 500 mg once daily with food, titrating to 500 mg twice daily or higher; usual maximum depends on formulation and renal function.	Severe renal impairment, acute metabolic acidosis. Temporarily withhold during severe hypoxia, shock, AKI or other lactic-acidosis risk and around iodinated contrast according to renal status/protocol.	Alcohol and nephrotoxic/renal-altering drugs increase risk. Cimetidine can raise levels.	Diarrhoea, nausea, abdominal discomfort, B12 deficiency. Rare but serious lactic acidosis.	Give with meals and titrate slowly. Monitor eGFR, dehydration/acute illness and periodic B12. Explain sick-day/contrast instructions.
Sulfonylurea Gliclazide, glimepiride	Closes beta-cell potassium channels, releasing insulin regardless of glucose; hepatic metabolism with renal/biliary elimination varies.	Type 2 diabetes when endogenous insulin remains. Gliclazide often starts 40–80 mg daily with breakfast; preparation-specific maxima differ.	Type 1 diabetes, DKA, pregnancy unless specialist direction. Caution older adults, renal/hepatic impairment and inconsistent meals.	Other glucose-lowering drugs/alcohol increase hypoglycaemia; beta-blockers mask signs; CYP inhibitors/inducers alter levels.	Hypoglycaemia, weight gain, GI upset, rash. Severe/prolonged hypoglycaemia and rare blood dyscrasias.	Give with meal; ensure food access. Monitor glucose and recurrent hypoglycaemia. Do not automatically discharge after one glucose correction because recurrence may last many hours.
SGLT2 inhibitor Empagliflozin, dapagliflozin	Blocks renal glucose/sodium reabsorption, causing glycosuria and natriuresis; oral with renal elimination varying by agent.	Type 2 diabetes, heart failure and CKD in appropriate patients. Common examples: empagliflozin 10 mg daily; dapagliflozin 10 mg daily.	DKA, severe dehydration; renal thresholds are agent/indication-specific. Stop before major surgery or prolonged fasting per protocol. Caution genital infection and low BP.	Diuretics increase volume depletion; insulin/sulfonylurea increases hypoglycaemia.	Genital mycosis, polyuria, hypotension. Serious: euglycaemic DKA, urosepsis, AKI and rare Fournier gangrene.	Monitor renal function, hydration and genital/urinary symptoms. Suspect DKA despite near-normal glucose if nausea, abdominal pain, tachypnoea or ketones. Teach sick-day holding.
GLP-1 receptor agonist Semaglutide, liraglutide	Glucose-dependent insulin secretion, glucagon suppression, delayed gastric emptying and satiety. Peptide injections resist DPP-4 degradation; half-life varies.	Type 2 diabetes and selected obesity/CV indications. Start low and titrate: semaglutide SC commonly 0.25 mg weekly for 4 weeks, then 0.5 mg weekly; liraglutide often 0.6 mg daily then titrated.	Product warnings for medullary thyroid carcinoma/MEN2; avoid in severe gastroparesis. Caution pancreatitis, gallbladder disease and retinopathy with rapid improvement.	Delayed gastric emptying may alter oral drug absorption; insulin/sulfonylurea increases hypoglycaemia.	Nausea, vomiting, diarrhoea/constipation. Serious: pancreatitis, gallbladder disease, dehydration/AKI and severe GI effects.	Verify weekly versus daily product. Teach small meals and titration. Monitor hydration, renal function if vomiting, abdominal pain and glucose; review pre-procedure withholding plan.
DPP-4 inhibitor Sitagliptin	Prevents incretin breakdown, increasing glucose-dependent insulin and reducing glucagon. Oral; most require renal adjustment.	Type 2 diabetes. Sitagliptin commonly 100 mg daily with renal dose reduction.	Hypersensitivity. Caution pancreatitis, severe joint pain and heart failure with some agents.	Low major interaction burden; digoxin level may rise slightly with some agents.	Nasopharyngitis, headache. Rare pancreatitis, angioedema, bullous pemphigoid and severe joint pain.	Review renal function and agent-specific heart-failure risk. Report persistent abdominal pain, blistering or facial swelling.

Thyroid Medicines

Medicine	PD/PK	Indications and common dose	Contraindications/precautions	Interactions	Side/adverse effects	Nursing care
Levothyroxine	Synthetic T4 converted peripherally to T3; long half-life about 7 days and narrow therapeutic index.	Hypothyroidism and selected TSH suppression. Healthy younger adults may need about 1.6 micrograms/kg/day; older adults/cardiac disease start much lower, often 12.5–25 micrograms daily, then titrate by TSH.	Untreated adrenal insufficiency, uncorrected thyrotoxicosis. Caution coronary disease, arrhythmia and osteoporosis.	Iron, calcium, antacids and some foods reduce absorption; separate by several hours. Enzyme inducers increase need. Warfarin effect may increase as euthyroidism returns.	Correct dose is usually well tolerated. Excess causes palpitations, tremor, insomnia, angina, AF and bone loss.	Give consistently on empty stomach with water. Monitor TSH about 6–8 weeks after dose change. Do not interchange brands casually. Exclude adrenal insufficiency before replacement when suspected.
Carbimazole/methimazole	Inhibits thyroid peroxidase, reducing new hormone synthesis; does not remove stored hormone, so effect takes weeks. Carbimazole is converted to methimazole.	Graves disease and preparation for definitive therapy. Common methimazole dosing roughly 10–30 mg/day depending severity; carbimazole doses differ.	Previous serious thionamide reaction. Pregnancy requires specialist drug/timing choice. Caution liver disease and marrow suppression.	Warfarin requirements change as thyroid state changes. Iodine exposure alters control.	Rash, pruritus, arthralgia and GI upset. Serious: agranulocytosis, hepatitis/cholestasis and vasculitis.	Baseline CBC/liver tests as directed. Teach: stop medicine and seek urgent CBC for fever or sore throat; urgent review for jaundice/dark urine. Monitor TSH/free T4.
Propylthiouracil	Blocks thyroid peroxidase and peripheral T4-to-T3 conversion; shorter half-life requires divided dosing.	Preferred in first trimester in many protocols and for thyroid storm. Thyroid storm commonly uses a large specialist loading dose followed by divided doses.	Severe liver disease or previous PTU injury. Not generally first choice long-term outside specific situations.	As for thionamides.	Rash and GI effects. Serious: potentially fatal hepatic failure, agranulocytosis and ANCA vasculitis.	Monitor liver symptoms and CBC red flags. In thyroid storm, give before iodine so new hormone synthesis is blocked first.
Iodine solution	High-dose iodide acutely blocks hormone release and organification; effect is rapid but temporary.	Thyroid storm and preoperative preparation. Dose/product vary; in storm it is given at least one hour after thionamide.	Iodine hypersensitivity does not equate simply to contrast allergy, but prior reactions and thyroid condition require review. Avoid prolonged unsupervised use.	Amiodarone and iodine-containing contrast alter thyroid function.	Metallic taste, mouth soreness, salivary swelling, rash; iodism and thyroid dysfunction.	Verify correct concentrated product and count drops precisely. Sequence after thionamide; monitor airway, GI symptoms and thyroid response.

Adrenal, Pituitary and Calcium-Regulating Medicines

Medicine	PD/PK	Indication and dose	Contraindications/precautions	Interactions	Side/adverse effects	Nursing care
Hydrocortisone	Glucocorticoid with mineralocorticoid activity; regulates stress response, vascular tone and metabolism. Short acting; hepatic metabolism.	Adrenal replacement and crisis. Adrenal crisis: common adult emergency regimen 100 mg IV/IM immediately, then 200 mg/24 hours or 50 mg every 6 hours with isotonic fluid and dextrose as needed.	No absolute contraindication in life-threatening adrenal crisis. Chronic use requires infection, diabetes, hypertension, ulcer and bone-risk assessment.	NSAIDs increase GI injury; vaccines, CYP inducers/inhibitors and glucose-lowering medicines interact clinically.	Short course: hyperglycaemia, mood change, fluid retention. Chronic: infection, hypertension, osteoporosis, cataract, muscle wasting and adrenal suppression.	Do not delay crisis dose for tests. Draw cortisol only if it does not delay treatment. Monitor BP, glucose, sodium/potassium, fluid balance and infection. Never abruptly stop chronic steroids; teach sick-day rules and emergency card.
Fludrocortisone	Potent mineralocorticoid increases renal sodium/water retention and potassium excretion; long biological effect.	Primary adrenal insufficiency mineralocorticoid replacement, often 0.05–0.2 mg orally daily, titrated to BP, electrolytes and renin.	Use caution heart failure, hypertension, oedema and hypokalaemia.	Diuretics/digoxin risk increases with hypokalaemia; NSAIDs increase fluid/BP effects.	Hypertension, oedema, headache and hypokalaemia; serious heart failure.	Monitor lying/standing BP, weight, oedema, sodium, potassium and salt craving. Teach not to change dose independently.
Desmopressin	Selective V2 agonist increases renal collecting-duct water reabsorption; minimal vasoconstriction. Renal elimination.	Central diabetes insipidus and selected haemostatic indications. DI dose is route- and response-specific; oral, intranasal and parenteral forms are not dose-equivalent.	Hyponatraemia, polydipsia and significant renal impairment. Caution heart failure and children.	SSRIs, carbamazepine and NSAIDs increase water-retention/hyponatraemia risk.	Headache, nausea and flushing. Serious: water intoxication, hyponatraemia, confusion and seizures.	Strict input/output, daily weight and sodium monitoring. Ensure access to water before dose during uncontrolled DI, then follow fluid plan after treatment. Never substitute routes dose-for-dose.
Calcium gluconate	Supplies ionised calcium, stabilises cardiac membranes in hyperkalaemia and treats symptomatic hypocalcaemia; IV effect is rapid.	Severe symptomatic hypocalcaemia and ECG-toxic hyperkalaemia. A common adult emergency dose is 10 mL of 10% calcium gluconate IV slowly, repeated based on ECG/response under protocol.	Use caution digoxin toxicity, hypercalcaemia and extravasation. Does not lower serum potassium.	Ceftriaxone incompatibility is critical in neonates; avoid mixing with bicarbonate/phosphate. Digoxin increases arrhythmia risk.	Flushing, nausea, bradycardia. Serious: arrhythmia, tissue injury and hypercalcaemia.	Continuous ECG in emergencies, secure IV line and slow administration. Confirm concentration. Follow with potassium-lowering therapy when used for hyperkalaemia.
Calcitriol	Active vitamin D increases intestinal calcium/phosphate absorption and suppresses PTH; rapid effect compared with nutritional vitamin D.	Hypocalcaemia in hypoparathyroidism and selected CKD mineral-bone disease. Common doses are in micrograms, often 0.25 micrograms daily initially.	Hypercalcaemia or vitamin D toxicity. Caution renal stones and high phosphate.	Thiazides increase hypercalcaemia; digoxin toxicity risk rises; magnesium antacids unsafe in CKD.	Hypercalcaemia, hyperphosphataemia, nausea and weakness; nephrocalcinosis.	Avoid mg/microgram errors. Monitor calcium, phosphate and renal function; assess thirst, polyuria, constipation and confusion.

Endocrine Emergency Safety Priorities

Hypoglycaemia: treat immediately, recheck glucose in about 15 minutes, repeat if low, provide sustaining carbohydrate when alert, and identify the cause. Long-acting insulin or sulfonylurea can cause recurrence.
DKA/HHS: fluids, potassium-directed insulin, glucose/electrolyte monitoring and treatment of the trigger are inseparable. Insulin without potassium assessment can cause fatal hypokalaemia.
Thyroid storm: beta-blockade when appropriate, thionamide, iodine after thionamide, corticosteroid, cooling and trigger treatment require coordinated specialist care.
Myxoedema coma: airway/ventilation, cautious warming, IV thyroid hormone and stress-dose hydrocortisone after appropriate sampling require ICU/specialist management.
Adrenal crisis: do not wait for laboratory confirmation before hydrocortisone and isotonic fluid when strongly suspected.
Diabetes insipidus: replace fluid carefully and monitor sodium; desmopressin without monitoring can switch severe dehydration to water intoxication.

Endocrine Medicine Nursing Care Plan

Nursing problem	Outcome	Interventions and rationales	Evaluation
Risk for unstable blood glucose	Glucose remains in individualised target without symptomatic hypo/hyperglycaemia.	Check glucose at ordered times and with symptoms; coordinate insulin with meals/feeds; verify dose/concentration; assess intake, vomiting, renal decline and steroid changes; treat abnormalities by protocol.	Stable trend; patient recognises and treats early symptoms.
Deficient/excess fluid volume	Stable BP, mental state, sodium and urine output.	Strict input/output, weight, mucosa, oedema, orthostatic BP and electrolytes; replace/limit fluid according to diagnosis; escalate rapid sodium change.	Improved perfusion and safe sodium correction.
Knowledge deficit	Patient demonstrates medicine use and sick-day plan.	Teach-back for insulin storage/injection, glucose testing, hypoglycaemia rescue, steroid emergency card, levothyroxine separation and red-flag adverse effects.	Correct return demonstration and emergency plan.

Updated Authoritative Sources

Endocrine Medicines: Classes, Mechanisms, Emergency Uses and Safety

Why this topic matters in emergency medical care

Learning outcomes

By the end of this lesson, the learner should be able to:

Explain how the hypothalamus, pituitary, thyroid, parathyroids, adrenals, pancreas and gonads coordinate endocrine function.
Classify endocrine medicines by hormone replaced, receptor targeted, enzyme inhibited or metabolic pathway changed.
Compare insulin preparations, non-insulin glucose-lowering medicines and emergency glucose-raising medicines.
Recognise and initially manage hypoglycaemia, diabetic ketoacidosis (DKA), hyperosmolar hyperglycaemic state (HHS), thyroid storm, myxoedema coma, adrenal crisis and severe hypercalcaemia.
Apply safe principles of dose checking, route selection, preparation, administration, monitoring, documentation and handover.
Identify contraindications, interactions, high-risk populations and medicines that must not be stopped abruptly.
Use structured clinical reasoning in realistic EMT scenarios and answer examination-style revision questions.

1. Endocrine physiology and medicine targets

Gland or axis	Major hormones	Core physiological effects	Emergency relevance
Hypothalamus–pituitary	CRH, TRH, GnRH, GHRH, ACTH, TSH, LH, FSH, GH, prolactin; ADH from posterior pituitary	Controls downstream glands, growth, reproduction, water balance and stress response	Pituitary failure can cause adrenal insufficiency, hyponatraemia, hypoglycaemia and altered consciousness.
Thyroid	Thyroxine (T4), triiodothyronine (T3), calcitonin	Sets basal metabolic rate, heat production, cardiac sensitivity to catecholamines and bone turnover	Excess may cause thyroid storm; severe deficiency may cause myxoedema coma, hypothermia and bradycardia.
Parathyroids	Parathyroid hormone (PTH)	Raises serum calcium, activates vitamin D and increases renal calcium conservation	Hypercalcaemia can cause dehydration, confusion, arrhythmia and renal injury; hypocalcaemia can cause tetany or seizures.
Adrenal cortex	Cortisol, aldosterone, adrenal androgens	Stress adaptation, vascular tone, glucose availability, sodium retention and potassium excretion	Adrenal crisis presents with shock, vomiting, abdominal pain, hypoglycaemia and electrolyte disturbance.
Adrenal medulla	Adrenaline and noradrenaline	Rapid sympathetic response: heart rate, contractility, vasoconstriction and bronchodilation	These drugs are life-saving when correctly indicated but can cause severe tachyarrhythmia or ischaemia if misused.
Pancreatic islets	Insulin, glucagon, somatostatin	Balances glucose storage, mobilisation and nutrient metabolism	Insulin excess causes hypoglycaemia; insulin deficiency causes DKA or HHS.
Bone–kidney–vitamin D axis	Calcium, phosphate, vitamin D, PTH	Maintains neuromuscular function and skeletal mineralisation	Calcium abnormalities may produce weakness, paraesthesia, seizures or ECG changes.

2. General principles of endocrine pharmacology

2.1 Replacement, suppression and receptor modification

Replacement: insulin for absolute insulin deficiency, levothyroxine for thyroid hormone deficiency and hydrocortisone for cortisol deficiency.
Suppression or blockade: antithyroid medicines reduce new thyroid hormone synthesis; glucocorticoid antagonists block cortisol effects; somatostatin analogues suppress selected pituitary and gastrointestinal hormones.
Receptor or pathway modification: GLP-1 receptor agonists increase glucose-dependent insulin secretion and reduce appetite; SGLT2 inhibitors promote urinary glucose loss; bisphosphonates reduce osteoclast activity.
Emergency antagonism or rescue: glucagon and concentrated glucose reverse severe hypoglycaemia; calcium may stabilise the myocardium in selected hyperkalaemic or hypocalcaemic emergencies.

2.2 Pharmacokinetics that change emergency decisions

Principle	What it means	Why the EMT cares
Onset and peak	Time until an effect begins and reaches its maximum	Rapid-acting insulin can cause early hypoglycaemia; long-acting insulin may continue acting after the patient appears improved.
Half-life and duration	Time for concentration to fall and clinical effect to wear off	Recurrent hypoglycaemia may occur after sulfonylurea or long-acting insulin exposure.
Route and bioavailability	Amount reaching systemic circulation depends on IV, IM, subcutaneous, oral or enteral delivery	Shock, vomiting or poor perfusion can make oral or subcutaneous absorption unreliable.
Protein binding and distribution	Only unbound drug is readily active; altered albumin or fluid status changes distribution	Critical illness and kidney disease can increase toxicity from highly protein-bound or renally cleared medicines.
Hepatic metabolism	Liver enzymes transform many medicines before elimination	Severe hepatic disease may prolong effects and increase hypoglycaemia risk.
Renal clearance	Kidneys excrete drug or active metabolites	Insulin, metformin metabolites and several glucose-lowering medicines require extra caution in kidney impairment.

3. Endocrine medicines: a practical classification

Group	Representative medicines	Main emergency or clinical use	High-risk problem
Insulins	Regular/soluble, NPH, glargine, detemir, degludec, lispro, aspart	Type 1 diabetes, selected type 2 diabetes, DKA and HHS protocols	Hypoglycaemia, hypokalaemia, wrong product or wrong timing
Insulin secretagogues	Gliclazide, glimepiride, glibenclamide	Type 2 diabetes when pancreatic beta cells still produce insulin	Prolonged or recurrent hypoglycaemia, especially in older adults or renal disease
Insulin sensitiser	Metformin	First-line type 2 diabetes therapy in many patients	Lactic acidosis risk in severe hypoxia, shock, sepsis or renal failure
Incretin-based medicines	GLP-1 receptor agonists; DPP-4 inhibitors	Glucose control with low hypoglycaemia risk when used alone	Vomiting, dehydration, pancreatitis warning symptoms or delayed gastric emptying
SGLT2 inhibitors	Dapagliflozin, empagliflozin, canagliflozin	Type 2 diabetes; cardio-renal benefit in selected patients	Euglycaemic DKA, dehydration, genital infection and peri-operative risk
Thyroid replacement	Levothyroxine; liothyronine in selected specialist situations	Hypothyroidism and myxoedema coma protocols	Over-replacement may precipitate angina, atrial fibrillation or thyroid storm.
Antithyroid medicines	Propylthiouracil, methimazole/carbimazole, iodide	Thyrotoxicosis and thyroid storm treatment plans	Agranulocytosis, hepatotoxicity, and incorrect timing of iodide
Adrenal replacement	Hydrocortisone, prednisolone, fludrocortisone	Adrenal insufficiency and adrenal crisis	Failure to stress-dose can be fatal; abrupt chronic steroid withdrawal is dangerous.
Calcium and vitamin D medicines	Calcium gluconate, calcium chloride, calcitriol, cholecalciferol	Hypocalcaemia, tetany, selected cardiac membrane-stabilisation indications	Extravasation injury, arrhythmia or hypercalcaemia
Bone medicines	Bisphosphonates, denosumab	Hypercalcaemia of malignancy and osteoporosis management	Renal injury, hypocalcaemia, oesophageal irritation or jaw osteonecrosis

4. Insulin preparations and safe insulin practice

Insulin category	Examples	Typical profile (approximate)	Clinical teaching point
Rapid-acting analogue	Lispro, aspart, glulisine	Onset about 10–20 min; short duration	Usually coordinated with meals; hypoglycaemia occurs if food is delayed or missed.
Short-acting soluble human insulin	Regular insulin	Slower onset than analogues; can be used IV in monitored DKA protocols	Only use IV regular insulin when the local protocol and trained clinician specify it.
Intermediate-acting	NPH/isophane	Distinct peak; longer duration	Peak-related hypoglycaemia may occur overnight or between meals.
Long-acting basal	Glargine, detemir, degludec	Flat or near-flat basal effect; long duration	Do not mix glargine or detemir in the same syringe; never omit basal insulin in type 1 diabetes without specialist direction.
Premixed formulations	Human or analogue combinations	Fixed basal and meal components	Less flexible when meal size or timing changes; confirm the exact mixture.

4.1 Insulin administration checklist

Confirm the order: insulin name, concentration (for example U-100), dose, route, timing and indication.
Identify the patient: use two identifiers and ask about allergies, diabetes type, last meal and last insulin dose.
Check the product: inspect expiry, appearance and storage. Cloudiness is expected for some suspensions such as NPH but not for clear soluble insulin.
Check glucose and ketones: document capillary glucose; obtain ketones when DKA is possible and the equipment/protocol is available.
Check potassium and renal status in monitored care: insulin can worsen hypokalaemia; severe hypokalaemia generally requires correction before insulin in DKA protocols.
Use the correct device: an insulin syringe or pen marked in insulin units. Never estimate units with a non-insulin syringe.
Administer and observe: use correct subcutaneous sites and rotate them; IV insulin requires a pump or controlled infusion and independent double-check.
Reassess: repeat glucose at the protocol interval, watch for sweating, tremor, confusion, weakness, seizures or arrhythmia, and document response.

“RIGHT INSULIN” safety mnemonic

Recheck patient and prescription · Insulin name and concentration · Glucose/ketones · Hypokalaemia risk · Timing with food

Insulin device · Needle/site · Second checker for high-alert doses · Understand onset/peak · Look for hypoglycaemia · Inform and document · Next glucose check

5. Non-insulin glucose-lowering medicines

Class	How it works	Benefits	Important adverse effects and emergency cautions
Metformin (biguanide)	Reduces hepatic gluconeogenesis and improves insulin sensitivity	Effective, inexpensive and does not usually cause hypoglycaemia alone	Gastrointestinal upset; hold or seek prescriber review in shock, severe hypoxia, sepsis, acute kidney injury or major contrast-related risk because lactic acidosis is uncommon but serious.
Sulfonylureas	Stimulate pancreatic beta-cell insulin release regardless of current glucose	Lower glucose rapidly and are widely available	Prolonged hypoglycaemia; risk rises with missed meals, renal/hepatic impairment, alcohol or older age. Recurrent episodes need observation and medical review.
DPP-4 inhibitors	Prolong endogenous incretin action and glucose-dependent insulin secretion	Low hypoglycaemia risk when used alone; oral dosing	Dose adjustment may be needed in kidney disease; assess for pancreatitis symptoms and drug interactions.
GLP-1 receptor agonists	Increase glucose-dependent insulin, reduce glucagon, slow gastric emptying and increase satiety	Good glucose and weight effects; low hypoglycaemia risk without insulin or secretagogue	Nausea/vomiting and dehydration; consider aspiration risk from delayed gastric emptying. Severe persistent abdominal pain requires urgent assessment.
SGLT2 inhibitors	Reduce proximal renal glucose reabsorption, causing glucosuria and mild natriuresis	Cardio-renal benefits in selected patients	Genital/urinary infections, volume depletion and euglycaemic DKA. A near-normal glucose does not exclude DKA in a patient taking an SGLT2 inhibitor.
Thiazolidinediones	Activate PPAR-gamma and improve insulin sensitivity	Durable insulin-sensitising effect	Fluid retention, weight gain and heart-failure worsening; not an acute rescue medicine.
Alpha-glucosidase inhibitors	Delay intestinal carbohydrate breakdown and absorption	Reduce post-meal glucose rise	Flatulence and diarrhoea; if hypoglycaemia occurs with another medicine, use glucose rather than sucrose.

6. Hypoglycaemia: recognise, treat and prevent recurrence

Patient state	Immediate approach	Examples of treatment	Reassessment
Awake, protecting airway, able to swallow	Give fast-acting oral carbohydrate; do not give food or drink to a drowsy patient.	Glucose gel/tablets or a measured sugary drink according to local protocol; follow with longer-acting carbohydrate once recovered.	Recheck glucose after about 10–15 minutes; repeat treatment if still low, then investigate cause.
Confused, seizing, unconscious or unsafe swallow	Place in recovery position if breathing, suction as needed, give oxygen when indicated, obtain IV/IO access and call for advanced support.	IV dextrose/glucose using local concentration and dose, or IM/SC glucagon when IV access is delayed or unavailable and the protocol permits.	Recheck frequently; protect against recurrent hypoglycaemia, especially after sulfonylurea or long-acting insulin.
Persistent or recurrent episodes	Search for medication error, renal failure, sepsis, liver failure, adrenal insufficiency, starvation or alcohol.	May require dextrose infusion, prolonged observation and specialist treatment.	Document times, measured values, treatment and response; provide prevention education before discharge.

Never “feed” an unconscious patient. Oral fluids or sugar can be aspirated. Protect the airway, use a suitable parenteral rescue medicine under protocol and reassess continuously.

7. Diabetic ketoacidosis (DKA) and hyperosmolar hyperglycaemic state (HHS)

Feature	DKA	HHS	EMT implication
Typical onset	Hours to a few days	Days to weeks	Do not dismiss gradual confusion or dehydration as simple weakness.
Glucose	Raised, but may be only moderately elevated in euglycaemic DKA	Usually very high	Use ketones and clinical context; glucose alone cannot exclude DKA.
Ketones/acidosis	Prominent ketonaemia and metabolic acidosis	Minimal ketones; hyperosmolality dominates	Check capillary ketones if available and report results.
Neurology	Alertness varies; Kussmaul breathing may occur	Marked confusion, seizures or coma more common	Assess GCS/AVPU, airway, aspiration risk and stroke mimics.
Fluid deficit	Substantial	Often extreme	Establish IV access, monitor perfusion and follow a controlled fluid protocol; beware heart or kidney failure.

7.1 Pre-hospital priorities

Perform an ABCDE assessment, check glucose, temperature, mental status, respiratory pattern, blood pressure, pulse and oxygen saturation.
Look for triggers: infection, missed insulin, medication change, pregnancy, chest pain, stroke symptoms, abdominal pain, vomiting or SGLT2-inhibitor use.
Establish IV access where trained and permitted; obtain ECG and monitor rhythm if available.
Begin isotonic fluid resuscitation only according to local protocol and reassess frequently, particularly in older adults, heart failure or kidney disease.
Do not give an insulin bolus casually. DKA insulin therapy requires potassium assessment, controlled infusion and serial laboratory monitoring.
Transport urgently to a facility able to measure electrolytes, venous/arterial blood gas, ketones, renal function and osmolality.

8. Thyroid medicines

8.1 Levothyroxine and thyroid hormone replacement

Do not use a normal thyroid-stimulating hormone (TSH) value as an immediate measure of response in a critically ill patient; clinical context and free hormone results guide specialist decisions.
Older adults and people with coronary disease usually require cautious dose increases because thyroid hormone raises myocardial oxygen demand and can precipitate angina or atrial fibrillation.
In suspected myxoedema coma, airway support, active but controlled warming, glucose assessment, infection search and stress-dose corticosteroid coverage are priorities alongside specialist thyroid replacement.

8.2 Antithyroid medicines

Medicine/class	Mechanism	Uses	Safety warnings
Methimazole/carbimazole	Inhibits thyroid peroxidase, reducing organification and coupling	Most non-pregnancy thyrotoxicosis; specialist treatment plans	Fever or sore throat may indicate agranulocytosis; jaundice or dark urine may indicate liver injury. Seek urgent review.
Propylthiouracil (PTU)	Inhibits thyroid peroxidase and reduces peripheral T4-to-T3 conversion	Selected thyroid storm protocols and some pregnancy situations under specialist direction	Severe hepatotoxicity risk; do not substitute without prescriber guidance.
Iodide (potassium iodide or Lugol solution)	Rapidly inhibits thyroid hormone release and organification after an antithyroid drug	Thyroid storm or pre-operative preparation in selected protocols	Timing matters: giving iodide before blocking synthesis can provide substrate for new hormone production.
Beta-blocker	Controls adrenergic manifestations; propranolol also reduces T4-to-T3 conversion at higher doses	Tremor, tachycardia and hypertension in thyrotoxicosis	Bronchospasm, bradycardia, heart failure or shock may make it unsafe; treat the physiology, not just the pulse.

9. Thyroid emergencies

9.1 Thyroid storm

ABCDE assessment, cardiac monitoring, IV access, glucose, temperature, ECG and urgent transport.
Support oxygenation and circulation; use cautious fluids if heart failure is present and treat severe hyperthermia with cooling measures.
Search for and treat the trigger, especially infection, myocardial infarction, pulmonary embolism or medication interruption.
Specialist therapy commonly combines an antithyroid medicine, then iodide after an appropriate interval, a beta-blocker when haemodynamically safe, and glucocorticoid support.
Avoid aspirin for fever in suspected thyroid storm unless specifically directed, because it can increase free thyroid hormone; use local antipyretic guidance.

9.2 Myxoedema coma

Protect the airway early; hypoventilation and carbon dioxide retention may be prominent.
Handle gently and avoid rapid peripheral warming that can worsen vasodilation and hypotension.
Check glucose immediately and correct hypoglycaemia; obtain ECG and electrolytes.
Give stress-dose hydrocortisone when adrenal insufficiency cannot be excluded, then specialist-directed thyroid hormone replacement.
Look for infection even without fever; severe hypothyroidism can blunt the inflammatory response.

10. Adrenal medicines and corticosteroid safety

10.1 Corticosteroid classes

Medicine	Relative glucocorticoid effect	Mineralocorticoid effect	Practical use
Hydrocortisone	Short-acting, physiologic replacement and stress dosing	Meaningful	Preferred emergency medicine for suspected adrenal crisis in many protocols.
Prednisolone/prednisone	Intermediate-acting	Lower than hydrocortisone	Chronic replacement or inflammatory disease; conversion must be prescribed.
Dexamethasone	Long-acting and potent	Minimal	Useful when a glucocorticoid effect is needed without mineralocorticoid activity; specialist selection matters.
Fludrocortisone	Minimal glucocorticoid effect	Strong	Mineralocorticoid replacement in primary adrenal insufficiency; monitor blood pressure and electrolytes.

10.2 Adrenal crisis

Clinical reasoning example

Call for advanced help and perform ABCDE; place the patient supine if tolerated and monitor ECG, blood pressure, glucose and temperature.
Give parenteral hydrocortisone immediately when adrenal crisis is suspected according to the authorised local dose and route. Do not delay for cortisol results.
Give isotonic fluid for shock, reassessing lungs, perfusion and urine output; add dextrose when hypoglycaemia is present.
Search for triggers such as infection, gastroenteritis, trauma, surgery, missed doses or abrupt steroid cessation.
Communicate the last steroid dose, emergency injection, fluid volume, glucose trend, blood pressure and response during handover.

11. Calcium, vitamin D and bone medicines

Medicine/class	Mechanism or purpose	Emergency relevance	Key precautions
Calcium gluconate	Raises extracellular calcium and stabilises excitable membranes	Symptomatic hypocalcaemia; selected hyperkalaemia or calcium-channel-blocker toxicity protocols	Continuous ECG and local protocol; extravasation can injure tissue.
Calcium chloride	More elemental calcium per volume than gluconate	Selected resuscitation or toxicology indications under advanced protocols	Prefer a secure central line when required; severe extravasation risk.
Vitamin D/calcitriol	Improves intestinal calcium absorption; calcitriol acts rapidly	Chronic deficiency or hypoparathyroidism management	Overdose can cause hypercalcaemia, confusion, polyuria and renal injury.
Bisphosphonates	Inhibit osteoclast-mediated bone resorption	Hypercalcaemia of malignancy and skeletal disease; not immediate first-line resuscitation	Renal function, infusion rate and hypocalcaemia risk must be monitored.
Denosumab	Inhibits RANKL and osteoclast formation	Selected osteoporosis or malignancy indications	Delayed hypocalcaemia, especially with renal impairment; maintain follow-up.

12. Medication safety in endocrine emergencies

12.1 The endocrine medication history

Ask the exact medicine name, strength, formulation, route, usual time and last dose.
Ask about insulin pens, pumps, continuous glucose monitors, glucose tablets, glucagon kits, steroid cards or emergency injection kits.
Ask whether doses were missed, doubled, changed recently, vomited, taken with food or stopped because the patient felt better.
Identify over-the-counter products and supplements: calcium, iron, iodine-containing products, herbal remedies, weight-loss products and “energy” preparations.
Check pregnancy or breastfeeding, kidney/liver disease, heart failure, thyroid disease, adrenal disease, alcohol use and allergies.
Bring medicine containers, a photograph of the prescription or the patient’s treatment card to hospital when possible.

12.2 Look-alike and sound-alike risks

Risk	Example of error	Prevention
Units versus millilitres	Drawing up insulin units in a non-insulin syringe	Use the labelled insulin syringe/pen; independently verify concentration.
Product confusion	Mixing up rapid-acting and long-acting insulin	Read the label three times and use a second checker for high-alert doses.
Concentration confusion	Substituting U-200/U-300/U-500 for U-100 without recalculation	Use only the matching device and written prescription; never convert mentally during an emergency.
Route error	Giving concentrated calcium or IV insulin through an unsuitable route	Confirm route, line patency, dilution and monitoring requirements before administration.
Timing error	Giving iodide before an antithyroid drug in thyroid storm	Follow the sequence in the specialist protocol and document exact times.

13. Endocrine drug interactions

Combination or situation	Potential problem	Action for EMT/student
Insulin + alcohol or missed meal	Delayed or severe hypoglycaemia	Check glucose, ask about food and observe beyond the first improvement.
Insulin + beta-blocker	Beta-blockade may mask tremor and palpitations of hypoglycaemia	Rely on glucose measurement and neuroglycopenic signs, not pulse alone.
Levothyroxine + calcium/iron/antacids	Reduced absorption and apparent treatment failure	Ask about timing; refer for dose/spacing advice rather than doubling a dose.
Metformin + severe hypoxia/shock/acute kidney injury	Accumulation and lactic acidosis risk	Prioritise resuscitation and urgent clinician review; do not give extra doses.
SGLT2 inhibitor + fasting/infection/low-carbohydrate intake	Euglycaemic DKA	Check ketones and acid–base status when symptoms fit, even if glucose is not extreme.
Glucocorticoid + insulin or sulfonylurea	Steroid-induced hyperglycaemia; later hypoglycaemia when steroid effect wanes	Trend glucose and communicate the steroid timing.
Amiodarone + thyroid disease/levothyroxine	Iodine load and thyroid dysfunction	Include amiodarone history in altered mental status, arrhythmia or thyroid presentations.
Warfarin + thyroid replacement changes	Changing thyroid state alters clotting-factor turnover	Check anticoagulant history and communicate recent thyroid medicine changes.

14. Special populations

Children: dosing is weight-based, glucose reserves are limited and cerebral injury from rapid osmotic shifts is a concern. Use paediatric protocols and never extrapolate adult doses.
Pregnancy: glucose targets, insulin needs and thyroid ranges change. Avoid unapproved medicines and seek obstetric/medical advice early.
Older adults: renal impairment, polypharmacy, frailty and atypical hypoglycaemia make conservative dosing and longer observation important.
Kidney disease: insulin clearance falls, increasing hypoglycaemia risk; fluid and potassium decisions must be individualised.
Liver disease: glycogen storage and drug metabolism are impaired; hypoglycaemia may be prolonged.
Heart failure: fluid resuscitation can precipitate pulmonary oedema; reassess lung sounds, work of breathing and perfusion after every bolus.
Adrenal insufficiency: vomiting or diarrhoea may make oral therapy ineffective; the emergency injection kit and steroid card are important safety tools.

15. Calculations and monitoring

15.1 Weight-based dose calculation

15.2 Monitoring matrix

Medicine/problem	Baseline checks	During therapy	Stop/escalate indicators
Insulin infusion	Glucose, potassium, renal function, ketones/acid-base status	Hourly glucose in many protocols, potassium and ketones at protocol intervals, fluid balance	Severe hypoglycaemia, falling potassium, worsening shock or unexpected acidosis
Hydrocortisone/adrenal crisis	Glucose, sodium, potassium, blood pressure, suspected trigger	Perfusion, glucose, electrolytes, mental status and response to fluids/steroid	Persistent shock, arrhythmia, refractory vomiting or deteriorating consciousness
Antithyroid treatment	Clinical severity, ECG, liver history, infection symptoms	Heart rate, temperature, mental status, liver function and blood counts under medical care	Agranulocytosis symptoms, liver failure signs, worsening storm or heart failure
Calcium infusion	ECG, calcium, magnesium, renal function and IV access	ECG, symptoms, infusion site and repeat calcium	Extravasation, bradyarrhythmia, hypercalcaemia or persistent tetany

16. Clinical scenarios for EMT learners

Scenario 1: Awake hypoglycaemia

Scenario 2: Unconscious after sulfonylurea

Scenario 3: Euglycaemic DKA

Scenario 4: DKA with potassium concern

Scenario 5: Thyroid storm

Scenario 6: Adrenal crisis

Scenario 7: Myxoedema coma

17. Documentation and handover

Situation: the endocrine emergency suspected and the current threat.
Background: diabetes type, adrenal/thyroid disease, pregnancy, kidney disease and medication changes.
Assessment: airway, breathing, circulation, mental status, glucose, ketones, temperature, ECG and perfusion.
Recommendation: investigations or specialist support required, next glucose/ECG check and concerns about recurrence.

18. Common errors and how to correct them

Error	Why it is unsafe	Better practice
Giving oral sugar to an unconscious patient	Aspiration and airway obstruction	Airway protection and parenteral rescue medicine under protocol.
Using glucose alone to rule out DKA	Euglycaemic DKA can be missed	Ask about SGLT2 inhibitors and check ketones/acid–base status.
Starting insulin before considering potassium	Rapid intracellular shift can cause life-threatening hypokalaemia	Follow the DKA protocol and monitor ECG/electrolytes.
Stopping steroids when the patient improves	Adrenal crisis can recur and chronic therapy may have suppressed cortisol production	Continue the prescribed plan and arrange clinician-directed tapering.
Giving beta-blocker to every tachycardic thyrotoxic patient	May worsen shock, bronchospasm or decompensated heart failure	Assess perfusion, lung disease and ventricular function; involve senior clinician.
Repeating a long-acting insulin dose because glucose remains high	Delayed accumulation and later severe hypoglycaemia	Check timing, ketones, illness and prescribed correction plan.

19. Quick comparison of endocrine emergencies

Emergency	Clues	Immediate medicine/support principle	Major danger
Hypoglycaemia	Sweating, tremor, confusion, seizure, low glucose	Oral glucose if safe; IV/IM rescue if not; repeat measurements	Brain injury and recurrence
DKA	Polyuria, vomiting, abdominal pain, ketones, Kussmaul breathing	Fluids, controlled insulin and potassium management in hospital protocol	Acidosis, hypokalaemia, cerebral injury and shock
HHS	Profound dehydration, very high glucose/osmolality, altered mental status	Careful fluids, electrolyte management and controlled insulin	Thrombosis, seizures, cerebral oedema and cardiovascular collapse
Thyroid storm	Fever, agitation, tachyarrhythmia, GI symptoms, heart failure	Supportive care, antithyroid drug, delayed iodide, beta-blockade if safe, steroid	Arrhythmia, pulmonary oedema, shock
Myxoedema coma	Hypothermia, bradycardia, hypoventilation, confusion, hyponatraemia	Airway/ventilation, glucose, cautious warming, hydrocortisone and thyroid hormone	Respiratory failure and cardiovascular collapse
Adrenal crisis	Hypotension, vomiting, abdominal pain, hypoglycaemia, weakness	Immediate parenteral hydrocortisone, isotonic fluids and glucose when needed	Refractory shock and death
Severe hypocalcaemia	Perioral tingling, tetany, seizures, prolonged QT	ECG-monitored calcium replacement under protocol	Laryngospasm and ventricular arrhythmia

20. Revision questions

Why is insulin classified as a high-alert medicine?
Differentiate rapid-acting, short-acting, intermediate-acting and long-acting insulin.
Why can euglycaemic DKA occur with an SGLT2 inhibitor?
List five clinical signs of hypoglycaemia and explain why oral fluids are unsafe in an unconscious patient.
What are the three immediate priorities in a patient with suspected DKA?
Why must potassium be considered before or during insulin therapy for DKA?
Compare DKA and HHS in onset, ketones, neurological features and fluid deficit.
Explain the mechanism and major emergency warning of metformin.
What is the role of GLP-1 receptor agonists and what adverse effect can complicate emergency care?
Why can beta-blockers mask hypoglycaemia?
Describe the sequence and purpose of antithyroid drug, iodide, beta-blocker and steroid therapy in thyroid storm.
List five features of myxoedema coma.
Why is hydrocortisone given before or with thyroid hormone when myxoedema coma is suspected?
State the major signs of adrenal crisis and the first medicine that should not be delayed.
Explain the difference between glucocorticoid and mineralocorticoid effects.
Give four medication-history questions that can reveal an endocrine emergency trigger.
What are the main risks of IV calcium administration?
How should endocrine medicines be documented during handover?
Why are children, older adults, pregnant patients and people with kidney disease high-risk groups?
Write a safe plan for a patient who improves after hypoglycaemia but has taken a long-acting sulfonylurea.

21. Key takeaways

Endocrine medicines can rapidly alter consciousness, circulation, temperature, electrolytes and cardiac rhythm.
Glucose measurement is essential, but a normal or modest glucose does not exclude SGLT2-associated DKA.
Treat hypoglycaemia according to airway safety; oral carbohydrate is for an alert patient who can swallow.
DKA and HHS require controlled fluids, electrolyte assessment and protocol-driven insulin—not improvised boluses.
Thyroid storm and myxoedema coma are clinical emergencies: support ABCDE while arranging specialist treatment.
Suspected adrenal crisis is treated immediately with parenteral hydrocortisone and resuscitation; do not wait for laboratory confirmation.
Always verify units, concentration, route, timing, renal function, food intake, interactions and the next monitoring time.
Good documentation and handover prevent recurrence after the patient leaves the emergency scene.

22. Recommended references for further study

Endocrine Medicines: Classes, Mechanisms, Emergency Uses and Safety Read More »

Cardiovascular Medicines: Classes, Mechanisms, Emergency Uses and Safety

Why this lesson matters: Cardiovascular medicines can restore perfusion, reduce myocardial oxygen demand, prevent clot extension, control dangerous rhythms and protect organs. They can also cause profound hypotension, bradycardia, bleeding, arrhythmia, electrolyte disturbance or cardiac arrest when the indication, dose, route or monitoring is wrong. Emergency medical personnel must understand the medicine and the physiology together.

Learning outcomes

By the end of this lesson, the emergency medicine student should be able to:

Define cardiovascular medicines and relate drug action to cardiac output, preload, afterload, contractility, heart rate and rhythm.
Classify medicines used for hypertension, angina, acute coronary syndromes, heart failure, dysrhythmias, thrombosis, shock and cardiac arrest.
Explain the mechanisms, indications, major contraindications, adverse effects and monitoring requirements of common cardiovascular drug groups.
Recognise when chest pain, dyspnoea, syncope, hypotension, bradycardia, tachycardia or oedema may represent a life-threatening cardiovascular emergency.
Apply ABCDE, ECG, vital-sign and perfusion assessment before and after cardiovascular medicine administration.
Explain why the same medicine can be beneficial in one patient and dangerous in another.
Describe the emergency roles of antiplatelets, anticoagulants, fibrinolytics, vasopressors, inotropes and antiarrhythmics.
Identify high-risk interactions, dose errors, infusion hazards and situations requiring senior or specialist review.
Document cardiovascular medicines and communicate response, adverse effects and next actions during handover.

1. Cardiovascular system and drug targets

The cardiovascular system consists of the heart, blood vessels and circulating blood. The heart generates pressure; vessels distribute and regulate flow; blood carries oxygen, nutrients, hormones and waste. Cardiovascular medicines change one or more of these functions.

Physiological variable	Meaning	Drug effect that may change it
Heart rate (chronotropy)	Number of cardiac cycles per minute.	Beta-blockers, some calcium-channel blockers and ivabradine reduce rate; beta agonists and anticholinergics may increase it.
Conduction (dromotropy)	Speed of impulse transmission through the conducting system.	AV-nodal blockers slow conduction; adenosine produces transient AV-nodal block.
Contractility (inotropy)	Force of myocardial contraction.	Inotropes increase force; beta-blockers and some calcium-channel blockers reduce it.
Preload	Ventricular filling and wall stretch before contraction.	Diuretics and venodilators reduce volume; fluids may increase it.
Afterload	Resistance the ventricle must overcome to eject blood.	Arterial vasodilators, ACE inhibitors and ARBs reduce it; vasoconstrictors increase it.
Stroke volume	Blood ejected per beat.	Changes with preload, afterload and contractility.
Cardiac output	Heart rate × stroke volume.	Many cardiovascular emergencies are problems of rate, rhythm, filling, resistance or pump strength.
Vascular tone	Degree of constriction or dilation in vessels.	Vasopressors constrict; nitrates and calcium-channel blockers dilate selected vascular beds.
Coagulation and platelet activity	Processes that form or prevent clots.	Antiplatelets, anticoagulants and fibrinolytics reduce clot formation or dissolve clot.

Think cardiovascular drug action as “FILL–PUMP–PIPE–CLOT–RHYTHM”:
FILL = preload and volume; PUMP = contractility and cardiac output; PIPE = vascular resistance and blood pressure; CLOT = platelets and coagulation; RHYTHM = rate and conduction.

2. Cardiovascular emergencies that require rapid recognition

WHO identifies cardiovascular diseases as disorders of the heart and blood vessels, including coronary heart disease, cerebrovascular disease, peripheral arterial disease, rheumatic and congenital heart disease, deep-vein thrombosis and pulmonary embolism. Heart attacks and strokes are acute events that require immediate care.

Presentation	Red flags	Medication-related priorities
Chest pain/possible ACS	Pressure, radiation, sweating, nausea, dyspnoea, syncope, shock or new ECG changes.	Rapid assessment, ECG, antiplatelet/anti-ischaemic treatment under protocol, bleeding/allergy checks and urgent referral.
Acute pulmonary oedema	Severe breathlessness, orthopnoea, crackles, pink froth, hypoxia and hypertension or shock.	Position, oxygen if indicated, ventilatory support, diuretic/vasodilator decisions and close BP monitoring.
Cardiogenic shock	Hypotension, cold clammy skin, altered mental status, oliguria and weak pulse.	Support perfusion, avoid indiscriminate fluids, consider vasoactive therapy under advanced care.
Bradycardia	Low rate with hypotension, altered consciousness, chest pain, shock or acute heart failure.	Identify reversible causes; atropine/pacing pathway may be needed according to protocol.
Tachyarrhythmia	Very rapid rhythm with instability, chest pain, pulmonary oedema, syncope or hypotension.	Synchronised cardioversion may be time-critical; medicines depend on rhythm and stability.
Cardiac arrest	Unresponsive, absent/abnormal breathing and no signs of circulation.	High-quality CPR, defibrillation when indicated and guideline-directed medicines; never let drug preparation delay CPR.
Hypertensive emergency	Severe BP elevation with encephalopathy, stroke, ACS, pulmonary oedema, renal injury or aortic syndrome.	Controlled reduction with titratable therapy and organ-specific monitoring—not abrupt normalisation.
Thromboembolism	Sudden dyspnoea, pleuritic pain, hypoxia, unilateral swelling or neurological deficit.	Urgent diagnosis, anticoagulation or reperfusion decisions under specialist protocol.

3. General safety principles before giving cardiovascular medicines

Assess airway, breathing, circulation, disability and exposure before focusing on a medicine.
Record BP in both arms when clinically relevant, pulse rate and regularity, respiratory rate, oxygen saturation, temperature, mental status, urine output and perfusion.
Obtain a 12-lead ECG or rhythm strip when indicated and do not give an AV-nodal blocker without considering the rhythm.
Ask about allergies, pregnancy, kidney/liver disease, bleeding, erectile-dysfunction medicines, anticoagulants, stimulants and recent doses.
Confirm the indication, product, concentration, dose, route, infusion rate, monitoring and prescriber/protocol authority.
Check whether hypotension, bradycardia, dehydration, right-ventricular infarction, aortic stenosis, asthma or conduction disease changes the risk.
Reassess after administration; the desired effect is not merely a lower number on the monitor but improved perfusion and patient condition.

Never treat a number in isolation. A BP of 90/60 mmHg may be normal for one patient and life-threatening for another. A pulse of 45/min may be tolerated by an athlete or may represent high-grade heart block with shock.

4. Classification of cardiovascular medicines

Group	Main purpose	Examples
Antihypertensives	Reduce arterial pressure and long-term cardiovascular risk.	ACE inhibitors, ARBs, calcium-channel blockers, thiazide-like diuretics, beta-blockers and others.
Antianginals	Reduce myocardial oxygen demand or improve coronary supply.	Nitrates, beta-blockers, calcium-channel blockers and selected metabolic agents.
Heart-failure medicines	Reduce congestion, afterload, neurohormonal injury and hospitalisation; improve symptoms and survival.	Diuretics, ACE inhibitors/ARBs/ARNI, beta-blockers, mineralocorticoid antagonists, SGLT2 inhibitors and vasodilators.
Antiarrhythmics	Control rate, rhythm or conduction.	Adenosine, amiodarone, lidocaine, beta-blockers, selected calcium-channel blockers, magnesium and atropine.
Antiplatelets	Reduce platelet aggregation in arterial thrombosis.	Aspirin, clopidogrel and other P2Y12 inhibitors.
Anticoagulants	Reduce thrombin/factor activity and clot extension.	Heparins, low-molecular-weight heparin, warfarin and direct oral anticoagulants.
Fibrinolytics	Convert plasminogen to plasmin and dissolve selected clots.	Alteplase and other protocol-specific agents.
Vasopressors	Increase vascular tone and perfusion pressure.	Norepinephrine, epinephrine, vasopressin and selected agents.
Inotropes	Increase myocardial contractility when pump function is inadequate.	Dobutamine and other specialist-use agents.
Lipid-lowering medicines	Reduce atherosclerotic cardiovascular risk.	Statins, ezetimibe and other specialist therapies.

5. Antihypertensive medicines

Antihypertensives lower blood pressure by reducing vascular resistance, circulating volume, cardiac output or neurohormonal activation. Long-term control prevents stroke, heart failure, kidney disease and coronary events; emergency treatment is reserved for severe pressure elevation with acute organ injury or other defined indications.

5.1 ACE inhibitors

Examples: enalapril, lisinopril, captopril and ramipril.

Mechanism: inhibit conversion of angiotensin I to angiotensin II and reduce aldosterone. This promotes vasodilation, reduces sodium/water retention and lowers afterload and preload.

Uses	Important adverse effects	Major precautions/contraindications	Monitor
Hypertension, heart failure, diabetic kidney protection in selected patients, post-MI therapy.	Dry cough, hypotension, dizziness, hyperkalaemia, increased creatinine, angioedema.	Pregnancy; previous ACE-inhibitor angioedema; severe hyperkalaemia; bilateral renal-artery stenosis; acute kidney injury requires review.	BP, creatinine/eGFR, potassium, cough, facial/tongue swelling and urine output.

5.2 Angiotensin-receptor blockers (ARBs)

Examples: losartan, valsartan and candesartan. ARBs block the angiotensin-II receptor and generally do not cause bradykinin-related cough, but can still cause hypotension, hyperkalaemia and kidney injury. Do not combine ACE inhibitors and ARBs routinely; combination increases renal and potassium risk without routine benefit.

5.3 Calcium-channel blockers

Subclass	Examples	Main actions	Safety points
Dihydropyridines	Amlodipine, nifedipine, nicardipine.	Predominantly arterial vasodilation; reduce afterload.	Headache, flushing, ankle oedema, tachycardia or hypotension. Short-acting sublingual nifedipine is unsafe for rapid unmonitored BP reduction.
Non-dihydropyridines	Verapamil, diltiazem.	Slow AV-node conduction, reduce heart rate and contractility.	Bradycardia, AV block, constipation, hypotension and worsening systolic failure. Avoid in certain conduction disorders and with interacting AV-nodal blockers.

5.4 Diuretics

Class	Examples	Site/action	Emergency and monitoring points
Loop diuretics	Furosemide.	Block sodium-potassium-chloride transport in the thick ascending limb; powerful natriuresis and diuresis.	Useful for congestion/pulmonary oedema when indicated; monitor BP, urine output, potassium, sodium, magnesium, renal function and ototoxicity risk with rapid/high exposure.
Thiazide/thiazide-like	Hydrochlorothiazide, bendroflumethiazide, indapamide.	Reduce sodium reabsorption in the distal tubule.	Long-term hypertension; may cause hyponatraemia, hypokalaemia, hyperuricaemia, dehydration and glucose changes.
Potassium-sparing	Spironolactone, eplerenone, amiloride.	Reduce aldosterone-mediated sodium retention or block distal sodium channels.	Hyperkalaemia and renal injury; spironolactone may cause gynaecomastia. Check potassium/renal function and interacting medicines.
Osmotic	Mannitol in selected specialist indications.	Raises tubular osmolality and draws water into urine.	Requires careful diagnosis and monitoring; can worsen pulmonary oedema or renal failure in inappropriate patients.

5.5 Beta-blockers

Examples: metoprolol, atenolol, bisoprolol, propranolol, carvedilol and labetalol. They reduce sympathetic stimulation, heart rate, contractility and renin release. Some are beta-1 selective; selectivity is dose-dependent.

Uses: hypertension, angina, selected arrhythmias, post-MI care, chronic heart failure with specialist titration, thyrotoxicosis and some aortic conditions.
Adverse effects: bradycardia, hypotension, fatigue, bronchospasm, cold extremities, depression of exercise response and masking of hypoglycaemia.
Avoid or seek urgent review: cardiogenic shock, acute decompensated heart failure, severe bradycardia, high-grade AV block and active bronchospasm.
Do not stop abruptly: withdrawal may cause rebound tachycardia, hypertension, angina or infarction.

5.6 Alpha-1 blockers and centrally acting agents

Alpha-1 blockers such as prazosin relax arterial and venous smooth muscle but can cause first-dose postural hypotension and syncope. Centrally acting medicines such as clonidine reduce sympathetic outflow; sedation, dry mouth and rebound hypertension after abrupt withdrawal are important safety concerns. These are not usually first-line emergency choices without an authorised plan.

6. Antianginal medicines

Angina occurs when myocardial oxygen demand exceeds coronary oxygen supply. Medicines either reduce demand by lowering heart rate, contractility or wall stress, or improve supply by dilating coronary/venous vessels. New, prolonged or rest pain must be treated as possible acute coronary syndrome until assessed.

6.1 Nitrates

Examples: glyceryl trinitrate (nitroglycerin) sublingual spray/tablet, transdermal patches and IV infusion; isosorbide dinitrate/mononitrate.

Mechanism: release nitric oxide, increase cyclic GMP and relax vascular smooth muscle. Venodilation reduces preload; at higher exposure arterial dilation reduces afterload and myocardial work.

Uses	Adverse effects	Do not give or urgently clarify	Monitor
Angina/ACS symptom relief, acute pulmonary oedema with adequate BP, controlled hypertensive cardiac ischaemia.	Headache, flushing, dizziness, hypotension, reflex tachycardia and syncope.	Hypotension/shock, suspected right-ventricular infarction or severe preload dependence, recent PDE-5 inhibitor use, severe anaemia or raised intracranial pressure without specialist direction.	BP before and after, pain, mental status, pulse, perfusion and response.

6.2 Other antianginals

Beta-blockers: lower heart rate and contractility; useful for exertional angina when not contraindicated.
Calcium-channel blockers: reduce afterload and/or AV conduction; useful when beta-blockers are unsuitable or for vasospastic angina.
Ranolazine: reduces late sodium current and wall tension; specialist use, with QT and interaction precautions.
Ivabradine: slows sinus-node rate in selected patients; requires sinus rhythm and specialist criteria.
Antiplatelet/statin therapy: does not immediately relieve pain but reduces thrombotic and long-term atherosclerotic risk when indicated.

7. Heart-failure medicines

Heart failure is a syndrome in which the heart cannot provide adequate output or can do so only at high filling pressures. Acute decompensation may present with pulmonary oedema, peripheral congestion, fatigue, hypotension, cool extremities or altered consciousness.

Group	Long-term role	Acute-care considerations
Loop diuretics	Relieve fluid congestion and oedema.	Assess BP, renal function, urine output and electrolytes; response is clinical, not just a single dose.
ACE inhibitor/ARB/ARNI	Reduce afterload and maladaptive neurohormonal activity; improve outcomes in selected patients.	Hold or seek review in shock, severe hypotension, acute kidney injury or severe hyperkalaemia.
Evidence-based beta-blocker	Reduces chronic sympathetic injury and improves survival in stable patients.	Do not initiate or increase during shock or acute decompensation without specialist direction.
Mineralocorticoid antagonist	Reduces aldosterone-related remodelling and mortality in selected patients.	Monitor potassium and renal function.
SGLT2 inhibitor	Provides heart-failure and renal benefits in selected patients, with or without diabetes.	Consider dehydration, ketoacidosis risk and acute illness; follow local guidance.
Vasodilators	Reduce preload/afterload in selected patients.	Require adequate BP; avoid precipitous hypotension.
Inotropes	Temporarily improve contractility in selected low-output states.	Specialist/critical-care use; can cause arrhythmia and increase myocardial oxygen demand.
Digoxin	Slows AV conduction and increases contractility modestly; selected heart-failure or rate-control use.	Narrow therapeutic index; toxicity risk rises with renal impairment, hypokalaemia and interacting medicines.

8. Antiplatelet medicines

Platelets are central to arterial thrombus formation after plaque rupture. Antiplatelets reduce platelet activation and aggregation; they do not dissolve an established clot and they increase bleeding risk.

8.1 Aspirin

Aspirin irreversibly inhibits platelet cyclooxygenase and reduces thromboxane A₂ formation for the life of the platelet. It is used in selected acute coronary syndromes and secondary prevention.

Check: true allergy, active major bleeding, suspected aortic dissection, severe thrombocytopenia, recent haemorrhagic stroke, peptic-ulcer risk and concurrent anticoagulation.
Adverse effects: dyspepsia, gastrointestinal bleeding, bronchospasm in aspirin-sensitive asthma, renal effects and hypersensitivity.
Emergency teaching: do not give an antiplatelet for undifferentiated chest pain until contraindications and aortic/dissection features have been assessed according to protocol.

8.2 P2Y12 inhibitors

Examples: clopidogrel, prasugrel and ticagrelor. They block ADP-mediated platelet activation and are used with aspirin in selected ACS or after coronary intervention.

Safety issue	Why it matters	Action
Bleeding	Risk increases with anticoagulants, thrombolytics, trauma, surgery and older age.	Check bleeding, haemoglobin/platelets when available and invasive-procedure plans.
Upcoming surgery/procedure	Platelet inhibition may persist after the dose.	Notify the team; never stop dual therapy without authorised specialist advice.
Drug interactions	Metabolism and absorption may be altered by other medicines.	Review the complete medicine history.
Stroke mimic	Not every neurological deficit is an ischaemic stroke; intracranial bleeding must be considered.	Follow the stroke pathway and imaging/specialist decision.

9. Anticoagulant medicines

Anticoagulants reduce thrombin generation or activity and limit clot extension. They are used for venous thromboembolism, atrial fibrillation, mechanical valves, ACS and other indications. Anticoagulants do not directly dissolve a clot and can cause life-threatening bleeding.

Class	Examples	Mechanism/monitoring	Important risks
Unfractionated heparin	Heparin infusion/injection.	Enhances antithrombin activity; monitor aPTT or anti-Xa according to protocol, platelets and clinical bleeding.	Bleeding, heparin-induced thrombocytopenia, hyperkalaemia and osteoporosis with prolonged use.
Low-molecular-weight heparin	Enoxaparin and similar agents.	Predominantly factor Xa inhibition; dose depends on indication, weight and renal function.	Bleeding, accumulation in renal impairment and HIT risk.
Vitamin K antagonist	Warfarin.	Reduces vitamin-K-dependent clotting factors; monitor INR.	Many food/drug interactions, delayed onset/offset and major bleeding.
Direct oral anticoagulants	Apixaban, rivaroxaban, dabigatran and others.	Direct factor Xa or thrombin inhibition; routine INR is not a reliable measure of effect.	Bleeding, renal/hepatic dosing issues, adherence and procedure timing.
Direct thrombin inhibitor	Dabigatran or specialist parenteral agents.	Blocks thrombin activity.	Renal clearance and interactions; reversal/urgent-procedure planning.

Anticoagulant emergency assessment

Ask which anticoagulant, dose, last administration time, indication and adherence.
Look for gastrointestinal, urinary, vaginal, respiratory, intracranial, wound or retroperitoneal bleeding.
After trauma or a fall, consider occult intracranial bleeding even if the patient initially looks well.
Check BP, pulse, mental state, skin, puncture sites, urine/stool and haemodynamic status.
Bring the medication packaging or anticoagulation record to the receiving team.
Do not give reversal agents or blood products outside authorised advanced-care protocols.

10. Fibrinolytic (thrombolytic) medicines

Fibrinolytics convert plasminogen to plasmin, which breaks down fibrin in a thrombus. They may be considered in selected STEMI, ischaemic stroke or massive pulmonary embolism pathways where eligibility, timing, imaging and specialist oversight are confirmed.

Potential indication	Critical checks	Major danger
Selected acute ischaemic stroke	Time last known well, imaging excluding haemorrhage, BP, anticoagulant use, surgery and stroke criteria.	Intracranial haemorrhage and systemic bleeding.
Selected STEMI	ECG, symptom timing, PCI availability, contraindications and bleeding risk.	Intracranial or internal bleeding, reperfusion arrhythmias.
Massive/high-risk pulmonary embolism	Haemodynamic instability, imaging/clinical criteria and bleeding risk.	Major haemorrhage and procedural complications.

11. Lipid-lowering and vascular-protection medicines

Statins inhibit HMG-CoA reductase, lower LDL cholesterol and reduce atherosclerotic cardiovascular risk. They are preventive medicines, not immediate pain-relief drugs. Ezetimibe reduces intestinal cholesterol absorption and may be added or used when statins are not tolerated. Monitor for muscle symptoms, liver concerns and interactions according to local guidance.

12. Antiarrhythmic medicines

Antiarrhythmics alter automaticity, conduction, refractory period or AV-node activity. The ECG diagnosis and haemodynamic stability determine whether a medicine is appropriate. A drug that treats one rhythm can worsen another.

12.1 Adenosine

Adenosine produces a very brief AV-nodal block and may terminate selected regular narrow-complex supraventricular tachycardias. It does not treat ventricular fibrillation or irregular wide-complex tachycardia.

Explain the short-lived flushing, chest discomfort or sense of impending doom before administration when the patient is conscious.
Use rapid administration through a suitable proximal access followed by a flush only under authorised protocol.
Continuous ECG and resuscitation equipment must be available.
Use caution or specialist advice in asthma/bronchospasm, pre-excited atrial fibrillation, transplant patients and interacting medicines.

12.2 Amiodarone

Amiodarone has class III potassium-channel effects plus sodium-channel, calcium-channel and beta-blocking actions. It may be used for selected ventricular or supraventricular arrhythmias and refractory VF/pulseless VT under advanced life-support protocols.

Acute adverse effects: hypotension, bradycardia, QT prolongation and infusion-related reactions.
Long-term toxicities: thyroid, lung, liver, eye, skin and neurological effects.
Interactions: warfarin, digoxin and other QT-prolonging medicines require careful review.
Monitoring: ECG/QT, BP, rhythm, liver/thyroid/pulmonary review for ongoing therapy and infusion-site safety.

12.3 Lidocaine

Lidocaine blocks fast sodium channels and can suppress selected ventricular arrhythmias. It may be considered for VF/pulseless VT unresponsive to defibrillation under current resuscitation protocols. Neurological toxicity, seizures, hypotension and bradycardia are important risks.

12.4 Beta-blockers and non-dihydropyridine calcium-channel blockers

These slow AV-node conduction and can control ventricular rate in selected atrial fibrillation/flutter or supraventricular tachycardia. Do not give blindly to an unstable patient, a patient with pre-excited AF, severe heart failure, high-grade block, hypotension or a wide-complex rhythm of uncertain origin.

12.5 Magnesium

Magnesium is important in torsades de pointes due to prolonged QT and selected electrolyte-related arrhythmias. Routine magnesium is not beneficial for every cardiac arrest or every ventricular tachyarrhythmia; use the indication and protocol.

12.6 Digoxin

Digoxin increases vagal activity and has positive inotropic effects. It has a narrow therapeutic index. Toxicity may present with nausea, vomiting, confusion, visual disturbance, bradyarrhythmia, AV block or ventricular arrhythmias. Risk increases with renal impairment, hypokalaemia, hypomagnesaemia and interacting medicines.

13. Vasopressors and inotropes

Vasoactive medicines are high-alert infusions. They require a monitored environment, an infusion pump, reliable vascular access and a team able to recognise arrhythmia, extravasation and rapid changes in perfusion.

Medicine/group	Main action	Typical specialist indication	Key hazards
Norepinephrine	Predominantly alpha-1 vasoconstriction with some beta-1 activity.	Severe vasodilatory shock after appropriate assessment and fluid strategy.	Ischaemia, arrhythmia, extravasation necrosis and excessive afterload.
Epinephrine	Alpha and beta agonist; increases vascular tone, heart rate and contractility.	Cardiac arrest, anaphylaxis, selected shock and bronchospasm protocols.	Tachyarrhythmia, myocardial ischaemia, hyperglycaemia, hypokalaemia and dosing-concentration errors.
Dobutamine	Predominantly beta-1 inotropy with some vasodilation.	Selected low-output cardiogenic states with adequate pressure.	Arrhythmia, hypotension, increased oxygen demand and worsening obstruction.
Vasopressin	V1-mediated vasoconstriction.	Selected specialist shock or endocrine indications; not a routine substitute for epinephrine in adult cardiac arrest.	Ischaemia, hyponatraemia and excessive vasoconstriction.
Dopamine	Dose-dependent dopaminergic, beta and alpha effects; use is protocol-specific.	Selected bradycardic or shock states where alternatives and monitoring are available.	Arrhythmia, tachycardia, extravasation and variable response.

Vasoactive infusion safety

Confirm patient, indication, concentration, dose units, pump rate and target parameters.
Use standard concentrations and an independent double-check.
Use a dedicated line where possible and label the tubing and syringe/bag.
Monitor BP frequently or continuously, rhythm, peripheral perfusion, urine output, mental status and lactate/other perfusion markers as available.
Check the access site frequently; stop and escalate for pain, swelling, blanching or coolness suggesting extravasation.
Never abruptly stop a prolonged vasopressor infusion without an authorised plan; rebound hypotension may occur.

14. Cardiovascular medicines in cardiac arrest

High-quality CPR and early defibrillation remain the foundation of cardiac-arrest care. The 2025 AHA adult advanced-life-support guidance recommends epinephrine for adult cardiac arrest, with timing linked to shockable versus non-shockable rhythms, and allows amiodarone or lidocaine for VF/pulseless VT unresponsive to defibrillation. Routine calcium, sodium bicarbonate or magnesium is not recommended for undifferentiated arrest; these may be used for selected causes such as hyperkalaemia or toxic exposure.

Situation	Medication principle	What must not be delayed
Non-shockable arrest	Give guideline-directed epinephrine as soon as feasible while continuing CPR.	High-quality compressions, airway/ventilation and reversible-cause search.
Shockable VF/pulseless VT	Defibrillate and continue CPR; epinephrine and antiarrhythmic timing follow current algorithm.	Defibrillation and minimal interruptions.
Suspected hyperkalaemia	Calcium, insulin/glucose and other therapies only under the hyperkalaemia protocol.	CPR, ECG, rapid cause recognition and definitive treatment.
Toxicological arrest	Use poison-specific antidotes or adjuncts when indicated.	Resuscitation, decontamination decisions and toxicology advice.
Post-ROSC	Manage BP, oxygenation, ventilation, rhythm, glucose, temperature and cause.	Continuous monitoring, ECG, transfer to definitive care and documentation.

15. Bradycardia medicines and pacing pathway

Bradycardia is dangerous when it causes hypotension, altered mental status, ischaemic chest discomfort, acute heart failure or shock. Determine whether it is sinus bradycardia, AV block, medication effect, hypoxia, hypothermia, hyperkalaemia or another reversible cause.

Atropine: blocks muscarinic activity and may increase sinus rate and AV conduction in selected symptomatic bradycardia. It may be ineffective in infranodal high-grade block.
Transcutaneous pacing: may be required when medication is ineffective or the patient is unstable; provide analgesia/sedation only with appropriate monitoring and authorised expertise.
Epinephrine or dopamine infusion: may support rate and perfusion while awaiting pacing or definitive treatment under advanced protocol.
Correct reversible causes: hypoxia, hypothermia, myocardial infarction, medication toxicity and electrolyte abnormality.

16. Tachyarrhythmia medicines and cardioversion

First decide whether the patient is unstable. Hypotension, altered mental state, shock, ongoing ischaemic chest discomfort or acute pulmonary oedema indicate an emergency pathway, often requiring synchronised cardioversion rather than repeated medication trials.

Rhythm pattern	Possible medicine principle	Critical warning
Regular narrow-complex SVT	Vagal manoeuvres, then adenosine under ECG-monitored protocol when appropriate.	Do not use adenosine blindly for irregular or polymorphic rhythms.
Atrial fibrillation/flutter with rapid rate	Rate control or rhythm strategy depends on stability, ventricular function, pre-excitation and duration.	AV-nodal blockade can be dangerous in pre-excited AF.
Monomorphic wide-complex tachycardia	Treat as VT until proven otherwise; antiarrhythmic or cardioversion under advanced care.	Do not assume it is benign SVT with aberrancy.
Torsades/polymorphic VT with long QT	Immediate defibrillation if pulseless/unstable; magnesium and correction of causes in the protocol.	Stop QT-prolonging medicines and correct electrolytes.
VF/pulseless VT	Defibrillation, CPR, epinephrine and amiodarone/lidocaine according to current algorithm.	Drug preparation must not delay shock or compressions.

17. Acute coronary syndrome (ACS) medicine principles

ACS includes unstable angina, NSTEMI and STEMI. The emergency team must obtain ECG and urgent clinician/cardiology input; medicine choices depend on diagnosis, bleeding risk, renal function, timing and reperfusion pathway.

Recognise possible ACS from symptoms and atypical presentations, especially in women, older adults and people with diabetes.
Obtain and communicate a 12-lead ECG promptly; repeat if symptoms or the clinical picture changes.
Assess BP, oxygen saturation, pulmonary oedema, shock, bleeding, allergy, anticoagulant use and recent PDE-5 inhibitor use.
Use antiplatelet and anti-ischaemic treatment only under the authorised ACS pathway.
Provide oxygen when indicated by hypoxaemia or respiratory distress rather than automatically for every chest-pain patient.
Arrange urgent reperfusion/transfer when STEMI or high-risk ACS is suspected.
Document symptom onset/last known well, ECG time, medicines, doses, response and contraindications.

18. Hypertensive urgency versus emergency

Severe BP elevation without acute organ injury is managed differently from a hypertensive emergency with encephalopathy, stroke, ACS, pulmonary oedema, aortic dissection, renal injury or eclampsia. Rapid unmonitored reduction can reduce cerebral, coronary or renal perfusion.

Assessment	Questions
Neurological	Confusion, seizures, focal deficit, severe headache, visual change or reduced consciousness?
Cardiac	Chest pain, new ECG changes, arrhythmia, heart failure or aortic pain?
Respiratory	Hypoxia, crackles, frothy sputum or severe work of breathing?
Renal	Oliguria, haematuria, acute kidney injury or severe proteinuria?
Pregnancy	Pregnancy/postpartum, headache, visual symptoms, seizures or epigastric pain suggesting pre-eclampsia/eclampsia?
Medication factors	Missed medicines, stimulant use, withdrawal, interaction or incorrect measurement?

19. Cardiovascular drug interactions and contraindication patterns

Combination/problem	Potential harm	Safety action
Nitrate + PDE-5 inhibitor	Profound hypotension and cardiovascular collapse.	Ask specifically about sildenafil, tadalafil or similar medicines; escalate before nitrates.
ACE inhibitor/ARB + potassium-sparing diuretic	Hyperkalaemia and renal injury.	Review potassium/renal function and avoid casual duplication.
Beta-blocker + verapamil/diltiazem	Bradycardia, AV block, hypotension and heart failure.	Use only with an authorised indication and close monitoring.
Antiplatelet + anticoagulant + NSAID	Major gastrointestinal or intracranial bleeding.	Check indication, bleeding history and prescriber plan.
Amiodarone + warfarin/digoxin	Increased anticoagulant or digoxin effect and toxicity.	Specialist monitoring and dose review.
Diuretic + digoxin	Hypokalaemia increases digoxin toxicity and arrhythmia.	Monitor electrolytes and rhythm.
QT-prolonging medicines together	Torsades de pointes and sudden death.	Review ECG, electrolytes and alternatives.
Vasopressor extravasation	Local ischaemia and tissue necrosis.	Check line frequently and follow extravasation protocol.

20. Special populations and cardiovascular medicines

Patient group	Key risks	Practical precautions
Children	Weight-based dosing, narrow physiological reserve, congenital disease and different normal vital signs.	Use current paediatric protocol, actual weight, appropriate concentration and independent calculation.
Pregnancy/postpartum	Fetal exposure, altered haemodynamics, pre-eclampsia/eclampsia and postpartum cardiomyopathy.	Use obstetric emergency guidance and avoid assuming adult cardiovascular protocols are interchangeable.
Older/frail adults	Reduced renal clearance, orthostatic hypotension, falls, polypharmacy and sensitivity.	Review all medicines, measure postural symptoms where safe and reassess after small changes.
Renal impairment	Accumulation of digoxin, anticoagulants and some antihypertensives; electrolyte instability.	Check creatinine/eGFR, urine output, potassium and dose guidance.
Liver disease	Altered metabolism, albumin and coagulation.	Review bleeding risk, protein binding and interactions.
Asthma/COPD	Non-selective beta-blockade may precipitate bronchospasm.	Confirm indication and use a selective option only when authorised and appropriate.
Right-ventricular infarction/preload dependence	Nitrates/diuresis can reduce preload and worsen output.	Assess ECG, lungs, BP and clinical context before venodilators.
Shock	Hypotension may worsen with antihypertensives, nitrates, sedatives or excessive diuresis.	Prioritise perfusion and senior review; do not treat hypertension history blindly.

21. Cardiovascular medicine calculations

Use the prescribed dose, actual product concentration and current protocol. Cardiovascular infusions are high-alert medicines; calculate, label and independently check them.

Core formulas:
Volume = (prescribed dose ÷ dose available) × volume containing the available dose
Weight-based dose = dose/kg × weight in kg
Infusion rate = total volume ÷ time
Dose delivered per minute = concentration × infusion rate

Write the order and units without abbreviations.
Confirm whether the prescription uses mg/min, micrograms/min, micrograms/kg/min or another unit.
Check the final concentration after dilution, not only the amount in the ampoule.
Verify pump settings, line label, target BP/rate and maximum dose.
Ask for independent verification for epinephrine, norepinephrine, insulin, heparin, paediatric doses and antiarrhythmic infusions.
Recalculate whenever the bag, syringe, patient weight or pump setting changes.

22. Monitoring and documentation

Medicine group	Baseline checks	Follow-up monitoring
Antihypertensive/vasodilator	BP, perfusion, renal function, electrolytes and indication.	BP trend, dizziness, syncope, urine output, potassium/creatinine and symptom response.
Diuretic	Congestion, BP, renal function, potassium, sodium and weight.	Urine output, fluid balance, electrolytes, renal function, hearing symptoms for selected high-dose IV use.
Antiarrhythmic	12-lead ECG, rhythm, QT, BP, electrolytes and drug interactions.	Continuous ECG where indicated, rhythm conversion, bradycardia, hypotension and recurrence.
Antiplatelet/anticoagulant	Bleeding history, trauma, surgery, platelet/renal data and indication.	Bleeding, neurological change, puncture sites, haemoglobin/platelets/INR or other ordered tests.
Vasopressor/inotrope	Perfusion, access, rhythm, BP and indication.	Continuous BP/rhythm, perfusion, urine output, mental state and extravasation.
Thrombolytic	Imaging/ECG criteria, time, BP, contraindications and bleeding risk.	Neurological status, puncture sites, BP, bleeding and reperfusion complications.

Document

Indication, diagnosis or emergency protocol.
Medicine, concentration, dose, route, rate, time and prescriber/authorising clinician.
Baseline vital signs, ECG/rhythm and relevant laboratory or history findings.
Response: pain, BP, pulse, rhythm, oxygenation, perfusion, urine output and mental status.
Adverse effects, withheld doses, contraindications, escalation and communication.
For infusions: concentration, pump setting, line/site checks, titration target and handover.

23. Clinical scenarios

Scenario 1 — Chest pain and nitrate risk: A man with chest pressure asks for nitroglycerin. He is pale with BP 82/56 and took a PDE-5 inhibitor last night. Reasoning: treat as a high-risk emergency, do not administer nitrate, assess ABCDE/ECG, call senior help and follow ACS/shock protocol.

Scenario 2 — Pulmonary oedema: A patient is severely breathless with crackles, hypoxia and BP 210/120. Reasoning: position upright, support oxygenation/ventilation, monitor ECG/BP and follow the acute heart-failure pathway. Diuretic and vasodilator decisions require clinical context, not a single BP number.

Scenario 3 — Bradycardia with shock: Pulse is 34/min, BP 70/40, the patient is confused and has chest discomfort. Reasoning: activate the bradycardia emergency pathway, identify reversible causes, prepare atropine/pacing/vasoactive support under protocol and do not delay definitive care.

Scenario 4 — Irregular wide-complex tachycardia: A patient is hypotensive with an irregular wide-complex rhythm. Reasoning: do not give adenosine or AV-nodal blockade blindly. Treat as potentially dangerous, call advanced support and prepare the appropriate electrical/antiarrhythmic pathway.

Scenario 5 — Anticoagulant and trauma: An older adult on warfarin falls and briefly loses consciousness. Reasoning: consider occult intracranial bleeding, record the anticoagulant and last dose, stabilise, avoid unnecessary invasive procedures and arrange urgent evaluation.

Scenario 6 — Digoxin toxicity: A patient with renal impairment has nausea, confusion and a slow irregular pulse. Reasoning: suspect toxicity, stop further doses pending review, obtain ECG/electrolytes/renal information, monitor and seek urgent senior/toxicology advice.

Scenario 7 — Cardiac arrest: During CPR, a team member prepares bicarbonate routinely despite no specific indication. Reasoning: maintain high-quality CPR and defibrillation; routine bicarbonate is not recommended in undifferentiated arrest, but may be indicated for selected causes under protocol.

24. Examination and revision questions

Define preload, afterload, contractility, chronotropy, dromotropy and cardiac output.
Classify cardiovascular medicines by their main physiological target.
Explain the mechanism and major adverse effects of ACE inhibitors.
Compare ACE inhibitors and ARBs.
Differentiate dihydropyridine and non-dihydropyridine calcium-channel blockers.
List the major monitoring requirements for furosemide.
Explain the role and contraindications of nitrates in acute chest pain.
Why can beta-blockers be dangerous in shock, bradycardia or acute decompensated heart failure?
Differentiate antiplatelets, anticoagulants and fibrinolytics.
What bleeding checks are needed before anticoagulant or thrombolytic therapy?
Explain the main emergency role of adenosine.
Why must an irregular wide-complex tachycardia not be treated blindly with AV-nodal blockers?
Describe the important toxicities and interactions of amiodarone.
When may magnesium be useful in arrhythmia?
Describe the cardiovascular arrest roles of epinephrine, amiodarone and lidocaine.
Why are routine calcium, sodium bicarbonate and magnesium not given in every cardiac arrest?
List the safety checks for a norepinephrine infusion.
Explain how pregnancy, renal impairment and older age alter cardiovascular medicine safety.
What should be documented after administering an emergency cardiovascular medicine?
Describe the first actions for a patient with chest pain, hypotension and suspected ACS.

25. Key takeaways

Cardiovascular medicines act on filling, pump function, vascular tone, clotting or rhythm.
Always assess the patient, ECG, BP, perfusion, indication and contraindications before administration.
Nitrates, antihypertensives and diuretics can worsen hypotension or preload-dependent states.
Antiplatelets, anticoagulants and fibrinolytics prevent or treat thrombosis but can cause major bleeding.
Antiarrhythmics are rhythm-specific; the wrong drug can worsen conduction or cause fatal arrhythmia.
High-quality CPR and early defibrillation take priority over medication preparation during cardiac arrest.
Vasoactive infusions require standard concentrations, independent checks, pumps, secure access and continuous monitoring.
Children, pregnancy, renal disease, liver disease, frailty, asthma and shock require patient-specific review.
Document every dose, route, rate, response, adverse effect and handover concern.

References and further study

Clinical note: This is an educational revision resource for emergency medical-care students. It does not replace current Ugandan treatment guidelines, local formularies, ACLS/ALS protocols, authorised prescriptions, specialist review or facility policy. Cardiovascular medicines—especially vasoactive infusions, anticoagulants, thrombolytics and antiarrhythmics—must be given only within the practitioner’s scope and with the required monitoring.

Complete Cardiovascular Pharmacology Tables

Dosage safety: Adult doses below are teaching examples. Confirm diagnosis, blood pressure, pulse/rhythm, ECG, oxygenation, perfusion, weight, pregnancy, renal/hepatic function, electrolytes and the authorised local protocol. Emergency infusions require continuous monitoring and independent checking.

Antihypertensive and Heart-Failure Medicines

Medicine/class	Pharmacodynamics and pharmacokinetics	Indications and common adult dose	Contraindications/precautions	Interactions	Side/adverse effects	Nursing responsibilities
Amlodipine	Dihydropyridine L-type calcium-channel blocker causes arterial vasodilation. Slow oral onset and long half-life 30–50 hours; hepatic metabolism.	Hypertension and chronic angina. Common start 5 mg once daily, maximum 10 mg; frail/elderly may start 2.5 mg.	Severe hypotension/shock; caution aortic stenosis and hepatic impairment.	CYP3A4 inhibitors raise exposure; additive hypotension with other agents.	Ankle oedema, flushing, headache and palpitations; rare severe hypotension.	Measure BP, oedema and adherence. Explain oedema is not always heart failure but needs review. Do not use for rapid BP reduction.
Enalapril ACE inhibitor	Prodrug converted to enalaprilat; reduces angiotensin II/aldosterone and raises bradykinin. Renal elimination.	Hypertension, HFrEF and albuminuric CKD. Common start 2.5–5 mg once or twice daily, titrated to response.	Pregnancy, previous ACE-inhibitor angioedema, bilateral renal-artery stenosis and significant hyperkalaemia.	Potassium supplements/MRA increase hyperkalaemia; NSAID plus diuretic raises AKI risk; lithium toxicity may increase.	Cough, dizziness and creatinine rise. Serious: angioedema, AKI and hyperkalaemia.	Baseline and repeat creatinine/eGFR and potassium 1–2 weeks after starting/titrating. Assess BP and facial/tongue swelling; stop/escalate angioedema urgently.
Losartan ARB	Blocks AT1 angiotensin receptor without bradykinin accumulation; active metabolite, hepatic metabolism/renal-biliary excretion.	Hypertension, proteinuric CKD and selected HF. Common 50 mg once daily, 25 mg if volume depleted; titrate up to 100 mg/day.	Pregnancy, bilateral renal-artery stenosis and hyperkalaemia.	Potassium, NSAIDs, lithium and dual renin-angiotensin blockade.	Dizziness, hyperkalaemia, AKI; rare angioedema.	Same renal/potassium monitoring as ACE inhibitors. Do not combine routinely with ACE inhibitor.
Hydrochlorothiazide	Blocks Na/Cl cotransporter in distal tubule. Oral onset within hours, renal excretion; less effective at low GFR.	Hypertension and mild oedema. Common 12.5–25 mg once daily.	Anuria; caution gout, diabetes, hyponatraemia and sulfonamide reaction.	Digoxin toxicity with hypokalaemia; lithium rises; NSAIDs reduce effect.	Hyponatraemia, hypokalaemia, hyperuricaemia, hyperglycaemia and photosensitivity.	Monitor BP, weight, Na/K/Mg, glucose, uric acid and renal function. Give in morning and teach postural safety.
Furosemide	Blocks Na-K-2Cl transporter in thick ascending limb; rapid IV venodilation/diuresis. Renal delivery and elimination.	Pulmonary/peripheral oedema. Adult acute IV dose often 20–40 mg slowly, higher if chronic use/renal impairment; oral dosing individualised.	Anuria unresponsive to challenge, severe volume/electrolyte depletion. Caution sulfonamide allergy, gout and ototoxic combinations.	Aminoglycosides increase ototoxicity; digoxin risk with low K; NSAIDs reduce response; lithium rises.	Dehydration, hypotension, hypokalaemia, hyponatraemia, hypomagnesaemia and gout. Rapid high-dose IV can cause ototoxicity.	Daily weight, strict input/output, BP, lungs/oedema, renal function and electrolytes. Give IV slowly and reassess perfusion; do not treat all dyspnoea as fluid overload.
Spironolactone	Aldosterone antagonist in collecting duct; potassium-sparing. Hepatic active metabolites and slower onset.	HFrEF, resistant hypertension, ascites and hyperaldosteronism. HF commonly 25 mg daily, titrated.	Hyperkalaemia, Addison disease and severe renal impairment.	ACEI/ARB, potassium and trimethoprim raise K; NSAIDs worsen renal risk.	Hyperkalaemia, gynaecomastia, menstrual disturbance and GI upset; serious arrhythmia from high K.	Check K/creatinine before and within days to weeks after initiation/change. Teach avoidance of potassium salt substitutes.
Carvedilol	Blocks beta-1/beta-2 and alpha-1 receptors; reduces HR, renin and afterload. Hepatic metabolism.	Stable HFrEF and hypertension. HF often starts 3.125 mg twice daily with food, slowly doubled if stable.	Severe bradycardia/heart block, cardiogenic shock, decompensated HF needing inotropes, severe asthma.	Verapamil/diltiazem/digoxin increase bradycardia; masks hypoglycaemia.	Fatigue, dizziness, bradycardia and hypotension; serious heart block, bronchospasm and acute decompensation.	Check HR/BP and congestion before dose. Do not start/escalate during acute fluid overload/shock. Do not stop abruptly.

Antianginal, ACS and Lipid-Lowering Medicines

Medicine	PD/PK	Indication/dose	Contraindications/interactions	Adverse effects	Nursing care
Glyceryl trinitrate	Releases nitric oxide, increasing cGMP; venodilation reduces preload and myocardial oxygen demand. Sublingual onset 1–3 minutes with short duration.	Ischaemic chest pain and selected acute pulmonary oedema. 0.3–0.6 mg SL every 5 minutes up to 3 doses if BP/perfusion permit; infusion titrated in monitored care.	Hypotension, shock, right-ventricular infarct/preload dependence, severe aortic stenosis. Never combine with PDE5 inhibitors—sildenafil/vardenafil within 24 h or tadalafil within 48 h.	Headache, flushing, dizziness, reflex tachycardia; severe hypotension/syncope and methaemoglobinaemia rarely.	Check BP, pulse and recent PDE5 use before every dose; keep patient seated/supine and reassess pain/ECG. Do not use to test whether pain is cardiac.
Aspirin	Irreversibly blocks platelet COX-1/thromboxane for platelet lifespan; rapid absorption when chewed.	Suspected ACS unless contraindicated: 150–300 mg chewed, then 75–100 mg/day secondary prevention.	Active bleeding, severe allergy and selected asthma. NSAIDs, anticoagulants and steroids increase bleeding.	Dyspepsia, bronchospasm and bleeding; serious GI/intracranial haemorrhage.	Confirm no true allergy/active bleed; document loading time/dose. Do not confuse maintenance with loading.
Clopidogrel	Prodrug irreversibly blocks P2Y12 ADP receptor; CYP2C19 activation.	ACS/PCI and secondary vascular prevention. Loading 300–600 mg, then 75 mg daily per cardiology plan.	Active bleeding. CYP2C19 inhibitors may reduce activation; other antithrombotics increase bleeding.	Bleeding, rash; rare TTP and neutropenia.	Do not stop after stent without cardiology instruction. Monitor bleeding/CBC and neurological-fever-thrombocytopenia red flags.
Atorvastatin	Inhibits HMG-CoA reductase, upregulates hepatic LDL receptors; CYP3A4 metabolism.	ASCVD prevention and ACS high-intensity therapy. Common 20–80 mg once daily; ACS often 40–80 mg if appropriate.	Active liver disease and pregnancy. Strong CYP3A4 inhibitors and grapefruit increase myopathy risk.	Myalgia and liver-enzyme elevation; rare rhabdomyolysis and severe liver injury.	Baseline liver history; CK only with symptoms/risk. Teach to report severe muscle pain/weakness or dark urine.

Antiarrhythmics and Cardiovascular Emergency Medicines

Medicine	PD/PK	Indication/dose example	Contraindications/interactions	Adverse effects	Nursing responsibilities
Adenosine	Transient AV-node A1 receptor activation; half-life under 10 seconds.	Regular narrow-complex SVT after vagal manoeuvres. Adult 6 mg rapid IV push plus flush, then 12 mg if needed per protocol.	Second/third-degree block without pacemaker, sick sinus and severe asthma. Dipyridamole/caffeine alter effect; transplant recipients may need lower dose.	Flushing, chest pressure, dyspnoea and transient asystole; bronchospasm rarely.	Continuous ECG, resuscitation readiness and proximal large IV. Record rhythm strip. Explain brief unpleasant sensation.
Amiodarone	Mainly class III potassium-channel block with sodium, calcium and beta effects; extremely long half-life and hepatic accumulation.	VF/pulseless VT after shocks: 300 mg IV/IO bolus, then 150 mg. Stable wide-complex tachycardia infusion often 150 mg over 10 minutes.	Severe sinus-node dysfunction/AV block without pacing; caution QT prolongation and thyroid/liver/lung disease.	Raises warfarin/digoxin; many QT-prolongers. Grapefruit increases level.	IV hypotension/bradycardia. Chronic pulmonary fibrosis, thyroid dysfunction, liver injury, corneal/skin changes.	Continuous ECG/BP for IV use. Verify dilution/rate. Long-term thyroid, liver, lung and interaction monitoring.
Atropine	Competitive muscarinic antagonist increases SA rate and AV conduction; rapid IV action.	Symptomatic bradycardia: 1 mg IV every 3–5 minutes to maximum 3 mg in current adult resuscitation algorithms.	No absolute contraindication in unstable bradycardia; caution glaucoma, urinary retention and tachyarrhythmia. Often ineffective in high-grade infranodal block.	Other anticholinergics add toxicity.	Dry mouth, blurred vision, urinary retention, delirium and tachycardia; excessive dose worsens ischaemia.	Continuous ECG/BP; prepare pacing/vasopressor if ineffective. Document response and do not delay definitive pacing.
Adrenaline	Alpha-1 vasoconstriction plus beta-1 cardiac and beta-2 bronchodilator effects; rapid metabolism by COMT/MAO.	Cardiac arrest: 1 mg IV/IO every 3–5 minutes. Anaphylaxis: 0.5 mg IM of 1 mg/mL into anterolateral thigh, repeated about every 5 minutes if needed.	No absolute contraindication in cardiac arrest/anaphylaxis. Concentration/route errors are lethal.	MAOIs/TCAs and nonselective beta-blockers alter response.	Tremor, anxiety, tachycardia; serious arrhythmia, severe hypertension, ischaemia and pulmonary oedema.	State concentration and route aloud; independent check. Continuous ECG/BP when IV. IM thigh is first-line anaphylaxis—not subcutaneous and not routine IV bolus.
Digoxin	Inhibits Na/K ATPase, increasing intracellular calcium; vagal slowing of AV node. Narrow therapeutic index and renal elimination.	Selected HFrEF symptoms and AF rate control. Often 0.125–0.25 mg daily, lower in elderly/renal impairment; loading only when specifically prescribed.	Ventricular fibrillation; caution AV block, renal failure and electrolyte depletion.	Amiodarone/verapamil/macrolides raise levels; loop diuretic hypokalaemia increases toxicity.	Nausea, visual disturbance and bradycardia; serious atrial/ventricular arrhythmias and hyperkalaemia in acute toxicity.	Apical pulse/rhythm, renal function, K/Mg and level at correct post-dose time. Hold/escalate per order for bradycardia/toxicity symptoms; prepare digoxin immune Fab when indicated.

Cardiovascular Nursing Care Plan

Nursing problem	Outcome	Interventions and rationales	Evaluation
Decreased cardiac output	Stable perfusion, mental state, BP and urine output.	Trend ECG, HR/BP, capillary refill, consciousness and urine; administer/titrate prescribed drugs with pump; reassess after every change and escalate shock.	Improved perfusion without arrhythmia/hypotension.
Excess fluid volume	Reduced dyspnoea/oedema with stable renal function/electrolytes.	Daily weight, strict balance, lungs/oedema, oxygenation, diuretic timing and K/Na/creatinine; prevent falls.	Weight/congestion improve safely.
Risk for bleeding	No major bleeding during antithrombotic therapy.	Inspect skin, gums, stool/urine and neuro state; trend Hb/platelets; minimise punctures and teach warning signs.	Stable Hb and no bleeding.

Authoritative Sources

Cardiovascular Medicines: Classes, Mechanisms, Emergency Uses and Safety Read More »

Antimicrobial Resistance (AMR): Mechanisms, Clinical Impact & Stewardship

Antimicrobial Resistance (AMR): Mechanisms, Causes, Clinical Impact and Stewardship

Why this lesson matters: Emergency teams cannot safely assume that every fever needs an antibiotic or that a familiar antibiotic will work. Antimicrobial resistance can turn an ordinary infection into sepsis, prolong illness, increase complications and close the treatment options available to the next patient. Every emergency medical technician contributes to AMR prevention through accurate assessment, timely specimens, infection prevention, safe administration, patient education and careful handover.

Learning outcomes

By the end of this lesson, the emergency medicine student should be able to:

Define antimicrobial, antimicrobial resistance, multidrug resistance, antibiotic susceptibility and antimicrobial stewardship.
Distinguish antibiotic resistance in bacteria from resistance involving viruses, fungi and parasites.
Explain how microorganisms acquire and spread resistance through mutation, selection and horizontal gene transfer.
Describe major mechanisms of resistance, including drug inactivation, target modification, reduced permeability, efflux and pathway protection.
Identify patient, prescriber, health-facility, community, agricultural and environmental drivers of AMR.
Recognise the clinical, economic and public-health consequences of resistant infection.
Apply emergency assessment principles to a patient with suspected severe or resistant infection.
Explain how cultures, susceptibility testing, antibiograms and surveillance support rational antimicrobial selection.
Describe antimicrobial stewardship interventions: prevention, diagnostic stewardship, right drug, dose, route, timing, duration, review and de-escalation.
Use infection-prevention measures and communication strategies to reduce transmission and unnecessary antimicrobial exposure.
Discuss Uganda’s One Health AMR response and the role of emergency medical personnel.

1. What are antimicrobials?

Antimicrobials are medicines or substances that prevent the growth of, inhibit or kill microorganisms. The term includes antibiotics, antivirals, antifungals and antiparasitic medicines. An antibiotic specifically targets bacteria; it does not treat viral influenza, most common colds or other non-bacterial illnesses.

Group	Target	Examples of infections or conditions	Emergency relevance
Antibacterials/antibiotics	Bacteria	Pneumonia, meningitis, urinary infection, wound infection and sepsis when bacterial infection is suspected.	Wrong selection or delay can be fatal; unnecessary use drives resistance.
Antivirals	Viruses	Selected influenza, HIV, hepatitis, herpes and other viral diseases.	Effect is often time-dependent and diagnosis-specific; antibiotics are not substitutes.
Antifungals	Fungi	Candidiasis, cryptococcosis, dermatophyte and invasive fungal infection.	Many are toxic or interact with emergency medicines; confirmation and monitoring matter.
Antiparasitics	Protozoa, helminths and ectoparasites	Malaria, amoebiasis, schistosomiasis, helminth infections and scabies.	Species, severity, pregnancy and organ function influence treatment.
Antiseptics	Microorganisms on living tissue	Skin and mucosal preparation or wound care.	Correct concentration and contact time are required; not all are safe to swallow or inject.
Disinfectants	Microorganisms on non-living surfaces	Environmental and equipment decontamination.	They are not systemic medicines and may be toxic if used on patients.

2. Definition of antimicrobial resistance

Antimicrobial resistance (AMR) occurs when microorganisms change or acquire traits that allow them to survive exposure to medicines that would previously inhibit or kill them. The organism—not the patient—becomes resistant. A person may carry a resistant organism without symptoms and can transmit it to another person.

WHO describes AMR as a situation in which bacteria, viruses, fungi and parasites no longer respond to antimicrobial medicines, making infections difficult or sometimes impossible to treat. This increases the risk of spread, severe illness, disability and death.

Do not say “the patient is resistant.” Say “the infection is caused by a resistant organism” or “the isolate is resistant to [medicine].” The patient may have an immune problem, poor drug exposure, a wrong diagnosis or treatment failure without the organism being genetically resistant.

Important terms

Term	Meaning	Example
Susceptible	The organism is likely to respond to an antimicrobial at achievable exposure using the tested method and standard dose.	A urine isolate is susceptible to the recommended oral medicine.
Intermediate or increased exposure	The result may require higher exposure, altered dosing or a specific site of infection to achieve success.	A medicine may work when the dose or infusion strategy is optimised.
Resistant	The organism is unlikely to respond to the tested antimicrobial at usual exposure.	A bloodstream isolate is resistant to the initial antibiotic.
Intrinsic resistance	A natural characteristic of a species that makes a medicine ineffective.	A drug may have no useful target in that organism.
Acquired resistance	Resistance gained through mutation or genetic material from another organism.	A bacterium acquires a plasmid encoding an inactivating enzyme.
Multidrug-resistant (MDR)	Resistance to several antimicrobial classes, according to the organism-specific definition.	TB resistant to key first-line medicines or a hospital pathogen resistant to multiple classes.
Extensively drug-resistant (XDR)	Resistance to most available classes, leaving very limited options.	Some MDR organisms retain susceptibility to only a few reserve medicines.
Pandrug-resistant (PDR)	Resistance to all agents in all relevant antimicrobial categories tested.	A rare but critical situation requiring specialist and infection-control action.
Colonisation	Organisms are present and may multiply without causing disease.	Carriage of resistant bacteria on skin or in the nose.
Infection	Microorganisms invade or multiply with tissue response and clinical signs or symptoms.	Fever, pyuria, pneumonia or wound infection with a compatible pathogen.
Antibiogram	A summary of local susceptibility patterns for common organisms and medicines.	Guides empiric choices while awaiting the individual patient’s result.

3. Why AMR is a major emergency-medicine concern

Delayed effective treatment: sepsis, meningitis, pneumonia and wound infection can deteriorate while the initial medicine is ineffective.
Fewer treatment choices: clinicians may need medicines that are more toxic, expensive, unavailable or difficult to administer.
Longer admission: resistant infections often require prolonged monitoring, isolation, procedures and intravenous treatment.
More complications: organ failure, abscess formation, treatment failure, recurrent infection and disability become more likely.
Transmission in crowded settings: ambulances, emergency departments, wards, households and communities can spread resistant organisms.
Higher procedure risk: surgery, chemotherapy, dialysis, intensive care and care of premature infants become less safe when infections cannot be treated.
Public-health impact: resistance crosses borders and moves between humans, animals, food, water, soil and healthcare facilities.

Emergency example: A patient with septic shock received an antibiotic from a previous clinic but is now worse. The correct response is not simply to repeat the same medicine. Reassess ABCDE, obtain cultures when this will not delay life-saving treatment, check the dose/route/timing and local resistance data, escalate for senior review and ensure source control.

4. The difference between antimicrobial resistance and treatment failure

Treatment failure is a clinical outcome; resistance is one possible cause. Before labelling an infection resistant, assess whether the problem is a wrong diagnosis, poor adherence, inadequate dose, wrong route, poor absorption, delayed administration, drug interaction, inadequate source control, an inaccessible infected site, immunosuppression or a laboratory error.

Possible reason for failure	Clues	Action
True resistance	Culture and susceptibility show non-susceptibility; patient remains unwell despite adequate exposure.	Escalate for targeted treatment and infection-control advice.
Wrong diagnosis	Signs suggest malaria, viral illness, trauma, inflammatory disease or non-infectious shock.	Reassess diagnosis and avoid adding unnecessary antibiotics.
Inadequate dose or interval	Under-dosing, missed doses, weight change or renal adjustment error.	Verify order, calculation, administration record and organ function.
Poor absorption	Vomiting, diarrhoea, ileus, malabsorption or reduced consciousness.	Use an authorised reliable route and monitor exposure.
Drug interaction	New medicine, food, antacid, enzyme inducer/inhibitor or herbal product.	Review the complete medication history.
Delayed treatment	Long interval between recognition, prescription, dispensing and administration.	Improve emergency workflow and document delays.
Inadequate source control	Abscess, obstructed urinary tract, infected device, necrotic tissue or retained foreign body.	Seek drainage, removal, decompression or surgical review.
Host factors	Neutropenia, HIV, diabetes, malnutrition, burns or severe organ disease.	Escalate early and coordinate supportive care.

5. One Health and the AMR ecosystem

AMR is not only a hospital problem. The same resistance genes and organisms can move through people, animals, food, water, soil and the environment. Human antimicrobial use, veterinary use, agricultural practices, pharmaceutical waste, sanitation and infection prevention all influence the overall risk.

One Health lens: human health + animal health + food systems + environment + water/sanitation + health systems + governance.

Resistant organisms can spread from household members, healthcare workers, patients, animals or contaminated surfaces.
Antimicrobials used in livestock and aquaculture can select resistant organisms and genes.
Inadequate waste disposal can expose communities and the environment to antimicrobials and resistant organisms.
Unsafe water, poor sanitation and overcrowding increase transmission and the need for treatment.
AMR surveillance is strongest when clinical, veterinary, laboratory, pharmacy, agriculture and environmental data are connected.

6. How resistance develops

Resistance is an evolutionary process. A microbial population may contain a small number of organisms with a resistance trait before treatment begins. When an antimicrobial is used, susceptible organisms are inhibited or killed while resistant organisms survive, multiply and become more common. Antimicrobial exposure does not “teach” every organism to resist in a deliberate way; it creates selection pressure that favours organisms already carrying or acquiring useful traits.

6.1 Mutation and selection

Microorganisms reproduce rapidly and copy genetic material. Random changes can alter a drug target, a membrane, an enzyme or a regulatory pathway. If the change helps survival in the presence of a medicine, that organism has a selective advantage. Incomplete treatment, repeated exposure and high transmission allow the resistant population to persist.

6.2 Horizontal gene transfer

Mechanism	How it happens	Why it matters
Conjugation	Direct transfer of plasmid DNA between connected bacterial cells.	Can spread several resistance genes together, including across species.
Transformation	A bacterium takes up free DNA fragments from its environment.	DNA released from dead bacteria may be incorporated into a new host.
Transduction	A bacteriophage carries bacterial DNA from one cell to another.	Resistance genes can move during viral infection of bacteria.
Transposons/integrons	Mobile genetic elements move resistance genes within or between DNA molecules.	Several mechanisms can be assembled and transferred as a package.

7. Major mechanisms of antimicrobial resistance

Mechanism	What the organism changes	Clinical consequence
Drug inactivation	Produces enzymes that break down or chemically modify the medicine.	The antimicrobial reaches the organism but is destroyed or neutralised.
Target modification	Changes the structure or amount of the cellular target.	The medicine binds poorly or cannot interrupt the essential process.
Reduced permeability	Removes, changes or closes channels through which the medicine enters.	Less medicine reaches the intracellular target.
Efflux pump	Actively pumps the medicine out of the cell.	Intracellular concentration remains below the effective level.
Metabolic pathway bypass	Uses an alternative biochemical route or obtains the product from another source.	Blocking one pathway no longer stops growth.
Biofilm formation	Organisms live in a protective matrix attached to a surface.	Reduced penetration, altered metabolism and persistent device-related infection.
Target protection	Protective proteins shield or replace the drug target.	The antimicrobial may bind but the vital function continues.

Examples of resistance mechanisms students should recognise

Beta-lactamase production: enzymes hydrolyse the beta-lactam ring of susceptible medicines; extended-spectrum enzymes may affect several cephalosporins.
Altered penicillin-binding proteins: the target changes so beta-lactams bind less effectively.
Reduced porin entry: fewer channels reduce penetration of certain medicines into Gram-negative bacteria.
Macrolide target modification: ribosomal binding sites are altered, reducing inhibition of protein synthesis.
Fluoroquinolone target mutation: changes in DNA gyrase or topoisomerase reduce binding.
Efflux: active transporters remove tetracyclines, macrolides, fluoroquinolones or other agents.
Biofilm-associated tolerance: organisms in catheters, wounds or prostheses may be difficult to eradicate without source control.

8. Drivers of antimicrobial resistance

AMR is driven by a combination of microbial evolution, antimicrobial exposure, transmission and weak systems. Blaming one patient or one prescriber hides the preventable conditions that need correction.

8.1 Patient and community drivers

Buying antimicrobials without an appropriate assessment or prescription.
Using leftover medicines, sharing medicines or taking a relative’s treatment.
Stopping when symptoms improve, missing doses or stretching doses to save money.
Taking antibiotics for viral colds, uncomplicated symptoms or non-infectious conditions.
Using poor-quality, expired, falsified or substandard products.
Self-medication with multiple medicines or mixing pharmaceuticals with unverified remedies.
Delayed presentation because of cost, distance, stigma, transport or limited trust.
Poor hand hygiene, unsafe water, inadequate sanitation, overcrowding and poor food hygiene.

8.2 Prescriber and health-worker drivers

Prescribing without adequate examination, differential diagnosis or diagnostic support.
Using broad-spectrum therapy when a narrower effective medicine is appropriate.
Failing to obtain cultures when indicated or failing to review the results.
Incorrect dose, interval, route, duration or adjustment for renal/liver function.
Continuing therapy without a documented indication or review date.
Giving antibiotics for patient pressure, diagnostic uncertainty or habit without safety-netting.
Not documenting the medicine, last dose, response, allergy or culture result at handover.
Using outdated guidelines or relying on memory when local resistance patterns have changed.

8.3 Facility and health-system drivers

Weak infection prevention and control, overcrowded rooms or inadequate isolation.
Insufficient laboratory capacity, delayed results or no local antibiogram.
Interrupted medicine supply causing substitution, incomplete courses or use of poor-quality products.
Unregulated access, poor storage, cold-chain failure or weak stock control.
Staff shortages, fatigue, interruptions and poor communication across transitions of care.
Weak antimicrobial stewardship governance, audit and feedback.
Limited access to vaccines, clean water, diagnostics and appropriate medicines.

8.4 Animal, food and environmental drivers

Antimicrobial use in livestock, poultry, fish and companion animals.
Routine or preventive use without veterinary assessment and monitoring.
Contaminated food, animal contact, slaughter environments and agricultural runoff.
Improper disposal of unused antimicrobials, animal waste, hospital waste or pharmaceutical effluent.
Movement of workers, animals, food and goods across districts and borders.

Key principle: every unnecessary antimicrobial course creates exposure without benefit. Every preventable infection avoided through vaccination, hand hygiene, safe water, source control and IPC is an antimicrobial course that may not be needed.

9. Antimicrobial exposure and selection pressure

Selection pressure increases when an antimicrobial is present at a site where microorganisms are exposed but susceptible organisms are not fully eliminated. The risk is influenced by the drug’s spectrum, concentration, tissue penetration, duration, adherence and the microbial population.

Exposure problem	How it can select resistance	Prevention
Unnecessary use	Exposes normal flora and colonising organisms without treating a bacterial disease.	Confirm indication and use delayed/alternative management when safe.
Too low a dose	May suppress susceptible organisms without achieving effective exposure.	Use weight, organ function, route and protocol-specific dosing.
Too long a course	Extends selection pressure after the infection is controlled.	Set a review/stop date and use the shortest effective duration.
Too broad a spectrum	Disrupts more normal flora and selects resistance across several organisms.	Choose the narrowest effective medicine after diagnostic review.
Interrupted supply or adherence	Leads to missed doses and treatment failure; the exact effect varies by medicine and infection.	Address access, side effects, understanding and follow-up rather than giving simplistic advice.
Poor tissue penetration	Effective plasma concentration may not reach the infected site.	Review site, source control, route and specialist guidance.

10. Clinical presentation of resistant infection

Resistance does not create one unique symptom pattern. A resistant infection may look like an ordinary infection at first. Suspicion rises when the patient fails to improve despite adequate treatment, has a history of resistant organisms, has repeated healthcare exposure or is in a setting where resistant pathogens are common.

Features that should raise concern

Persistent or worsening fever, tachycardia, tachypnoea, hypotension, confusion or reduced urine output despite treatment.
Progression of an infection while receiving an apparently appropriate medicine.
Previous culture showing a resistant organism or recent admission, surgery, dialysis or intensive-care stay.
Recent antimicrobial exposure, especially repeated broad-spectrum therapy.
Residence in or transfer from a facility with known outbreaks or high resistance rates.
Recurrent urinary, wound, respiratory or bloodstream infection with repeated treatment failure.
Indwelling catheter, vascular device, tracheostomy, prosthesis, chronic wound or other biofilm risk.
Immunosuppression, severe malnutrition, burns, HIV, diabetes or advanced organ disease.

Do not wait for the laboratory report to recognise danger. A patient with suspected sepsis needs immediate ABCDE assessment, resuscitation, source evaluation and timely clinician-led antimicrobial decisions. AMR changes the choice and review process; it does not justify delaying life-saving stabilisation.

11. Emergency assessment of suspected serious infection

Recognise danger: assess airway, breathing, circulation, disability, exposure, temperature, perfusion and mental status.
Identify possible infection: lungs, urinary tract, abdomen, skin/soft tissue, central nervous system, bloodstream, reproductive tract, bone/joint or device.
Estimate severity: hypotension, altered consciousness, hypoxia, oliguria, high work of breathing, mottling, delayed capillary refill and rapidly progressive disease require urgent escalation.
Ask about antimicrobial exposure: medicine, dose, route, start date, missed doses, recent courses, allergies and prior cultures.
Ask about healthcare exposure: recent admission, surgery, dialysis, device, long-term care, travel and known contact with resistant organisms.
Obtain appropriate specimens: cultures should be collected before antimicrobial therapy when feasible and should not delay resuscitation or time-critical treatment.
Support physiology: oxygen when indicated, vascular access, fluids/vasopressors, glucose management, analgesia, temperature control and monitoring under protocol.
Start source control: look for an abscess, obstructed system, infected device, necrotic tissue or retained foreign body.
Communicate: give a structured handover with suspected source, severity, exposures, allergies, specimens, medicine and response.

Specimens and diagnostic stewardship

Specimen principle	Why it matters	Common error
Collect from the correct site	Improves the chance that the result represents the infection rather than colonisation.	Swabbing a superficial area when a deep specimen is needed.
Use aseptic technique	Reduces contamination and false-positive results.	Contaminated blood culture leading to unnecessary antibiotics.
Collect before antimicrobials when feasible	Improves yield and helps later narrowing of therapy.	Delaying an unstable patient while trying to obtain every test.
Label accurately	Links result to patient, site and collection time.	Unlabelled or incorrectly labelled specimen.
Transport promptly	Preserves organism viability and result reliability.	Specimen left on a trolley or exposed to unsuitable temperature.
Interpret with clinical findings	Separates infection from colonisation or contamination.	Treating a positive colonisation result without compatible illness.

12. Antimicrobial stewardship

Antimicrobial stewardship (AMS) is a coordinated approach that promotes the best possible clinical outcome while minimising toxicity, unnecessary exposure, resistance and cost. Stewardship is not withholding treatment from a sick patient; it is ensuring that treatment is justified, timely, targeted, correctly dosed and reviewed.

WHO describes stewardship programmes as a core strategy against AMR and identifies interventions that can be adapted to low-resource facilities.

Emergency AMS — START, REVIEW, REFINE:
START when indicated and time-critical; REVIEW diagnosis, cultures, dose, route and response; REFINE by stopping, narrowing, changing or switching route when evidence supports it.

The “right” antimicrobial decision

Decision	Questions
Right patient	Is there evidence of infection in this patient, and what are the risks of treatment?
Right diagnosis	Is the syndrome bacterial, viral, fungal, parasitic, inflammatory, traumatic or non-infectious?
Right drug	Which medicine covers the likely pathogen and site based on guideline, local data and patient factors?
Right dose	Does the dose achieve effective exposure for weight, age, organ function, severity and site?
Right route	Can the patient absorb oral treatment, or is IV/another route required initially?
Right timing	Should it be given immediately, after cultures, before a procedure or at a specific interval?
Right duration	What is the intended course and review/stop date?
Right review	Who will check response, culture, toxicity, allergy, organ function and ongoing indication?
Right communication	Does the patient understand adherence, side effects, follow-up and when to return?

Core stewardship interventions

Guideline-based empiric therapy: use current national, facility and syndrome-specific guidance.
Prospective audit and feedback: review prescriptions and provide constructive recommendations.
Formulary restriction or pre-authorisation: reserve selected agents for defined indications and senior approval.
Antibiotic time-out: review the indication, culture, dose, route and duration after an agreed interval.
De-escalation: narrow spectrum or stop when results and clinical response permit.
IV-to-oral switch: change route when the patient is stable, absorbing and an effective oral option exists.
Dose optimisation: adjust for weight, renal/liver function, pharmacokinetics, infection site and severity.
Diagnostic stewardship: order, collect, label and interpret tests that can answer the clinical question.
Education and feedback: train prescribers, nurses, pharmacists, EMTs, patients and caregivers.
Surveillance and reporting: use resistance, antimicrobial-use and outcome data to improve practice.

13. Empiric, targeted and prophylactic therapy

Therapy type	When used	Stewardship rule
Empiric therapy	Before the pathogen and susceptibility are known, based on syndrome, severity, local data and patient risks.	Review when culture, imaging and clinical response become available.
Targeted/definitive therapy	After a pathogen and susceptibility pattern are available, or the diagnosis is sufficiently established.	Use the narrowest effective option at the correct exposure.
Prophylaxis	Prevention of a defined infection in a defined high-risk situation.	Use correct timing and duration; prophylaxis is not treatment of an established infection.
Suppressive therapy	Long-term reduction of recurrence when eradication is not possible.	Requires specialist indication, monitoring and review for resistance and toxicity.

14. De-escalation, escalation and treatment review

De-escalate: narrow spectrum, stop duplicate coverage, change IV to oral or stop when infection is not supported.
Escalate: seek senior/ID/microbiology advice when the patient deteriorates, the organism is resistant, the source is unclear or the current medicine is ineffective.
Continue: only when the diagnosis, response and risk–benefit assessment support ongoing treatment.
Change route: when circulation, absorption, organ function or clinical stability changes.
Change dose: when weight, renal/liver function, therapeutic monitoring or susceptibility requires it.
Control the source: antibiotics cannot replace drainage, debridement, device removal or relief of obstruction when those are needed.

15. Infection prevention and control (IPC) to prevent AMR

WHO identifies strong infection prevention and control as one of the most effective ways to control the spread of AMR: every infection prevented is an antimicrobial course avoided.

Standard precautions

Perform hand hygiene at the correct moments and technique.
Use gloves, gowns, masks, eye protection and other PPE according to exposure risk.
Clean and disinfect equipment between patients according to product and contact-time instructions.
Use safe injection practices; never reuse needles, syringes or single-dose vials between patients.
Dispose of sharps, dressings, body fluids and contaminated materials correctly.
Use respiratory hygiene, cough etiquette and appropriate masking during respiratory illness.
Clean reusable airway, suction, oxygen and transport equipment before reuse.

Transmission-based precautions

Precaution	Used when	Emergency actions
Contact	Organisms spread through direct or indirect contact.	Gloves/gown as indicated, dedicated equipment, environmental cleaning and cohorting/isolation.
Droplet	Large respiratory droplets are a major route.	Mask, source control, distance, ventilation and patient placement.
Airborne	Small particles remain suspended and travel through air.	Appropriate respirator, ventilation/airborne room and minimise unnecessary movement.
Protective environment	Patient is highly vulnerable to infection.	Strict hand hygiene, environmental controls and careful staff/visitor screening.

Device and procedure safety

Insert urinary, vascular and airway devices only when indicated and remove them as soon as no longer needed.
Use aseptic non-touch technique and maintain closed systems where appropriate.
Inspect wounds, drains and insertion sites at every handover.
Do not give prophylactic antibiotics as a substitute for sterile technique.
Clean and disinfect transport surfaces after a patient with a resistant organism or body-fluid contamination.

16. Diagnostic stewardship and laboratory reporting

Diagnostic stewardship means using tests in a way that improves clinical decisions and reduces unnecessary antimicrobial exposure. A test should answer a clinical question and its result should be available to the team that must act on it.

Laboratory element	What it tells the team	Limitations
Microscopy/Gram stain	Early information about organism type, inflammatory cells or specimen quality.	May be unavailable, insensitive or affected by prior treatment.
Culture	Identifies organisms that grow under the test conditions.	A negative result does not always exclude infection.
Susceptibility testing	Estimates whether an isolate is susceptible, intermediate/increased exposure or resistant.	Must be interpreted with site, dose, achievable exposure and clinical response.
Rapid molecular test	Detects selected organisms or resistance genes quickly.	Detecting DNA may not equal active infection or viable organisms.
Local antibiogram	Summarises facility or district susceptibility patterns.	May not represent every ward, patient group or current outbreak.
AMR surveillance	Tracks trends over time and supports policy, procurement and IPC.	Requires reliable sampling, laboratory quality and reporting.

17. Uganda’s AMR response

Uganda’s Ministry of Health publishes a national AMR action plan and supports a One Health response involving human health, animal health, agriculture, laboratories, pharmacies, environment and communities. The Ministry’s current AMR resources should be checked alongside facility guidelines and the current National Standard Treatment Guidelines.

Priority areas for Uganda’s health workers

Awareness and education: explain when antimicrobials are needed, how to take them safely and why sharing or saving leftovers is harmful.
Infection prevention: improve hand hygiene, cleaning, PPE, safe injections, isolation, vaccination and environmental sanitation.
Surveillance: collect quality specimens and report resistance, outbreaks, medicine use and adverse events.
Stewardship: follow national/facility guidelines, review therapy and use local laboratory data.
Access and quality: support availability of effective, quality-assured antimicrobials, diagnostics and vaccines.
One Health coordination: recognise connections among hospitals, communities, livestock, food systems and water.
Governance: participate in antimicrobial committees, audit, feedback, training and accountability.

Uganda-focused EMT contribution: record the medicine and last dose during referral, communicate prior cultures and allergies, prevent contamination during transport, avoid casual antibiotic advice, use PPE, collect specimens correctly and escalate suspected resistant infection early.

18. AMR in the emergency department and ambulance

Before arrival or at triage

Ask about recent admission, surgery, dialysis, antibiotics, cultures, resistant organisms and infection-control alerts.
Use source control and respiratory hygiene at the entrance for coughing or febrile patients.
Separate patients with suspected transmissible infection when possible and notify the receiving area.

During transport

Use appropriate PPE and clean high-touch surfaces between patients.
Keep specimens, medication charts, allergy information and last-dose times with the patient.
Do not start, stop or switch antimicrobials outside protocol; communicate concerns to the responsible clinician.
Use safe sharps disposal and avoid contaminating oxygen, suction, monitors or stretcher surfaces.

At handover

Handover item	What to say
Situation	Suspected source, severity, current vital signs and immediate risks.
Background	Recent healthcare exposure, antibiotics, cultures, devices, comorbidities and allergies.
Assessment	Clinical findings, specimens collected, oxygen/fluids, dose/route/time of medicine and response.
Recommendation	Pending results, isolation/PPE needs, next due dose, monitoring and escalation concerns.

19. Special clinical situations

Sepsis and septic shock

AMR risk does not change the need for immediate recognition and physiological support.
Obtain cultures where feasible without delaying resuscitation or time-critical treatment.
Use authorised empiric guidance that considers local resistance, previous cultures and recent antimicrobial exposure.
Review within the defined time window; narrow, change or stop when evidence supports it.
Look actively for source-control needs such as drainage or device removal.

Meningitis or severe central nervous system infection

Prioritise airway, breathing, circulation, seizures, glucose and urgent clinician-led treatment.
Do not delay time-critical treatment for a procedure that is unsafe or unavailable.
Communicate recent antibiotics, resistant organisms, travel and healthcare exposure.

Pneumonia and respiratory infection

Distinguish bacterial disease from viral infection, asthma, heart failure, aspiration or pulmonary embolism.
Use respiratory isolation and source control; assess oxygenation and work of breathing.
Review antibiotic response and culture/imaging results rather than automatically adding a second medicine.

Urinary infection and catheter-associated infection

Separate asymptomatic bacteriuria or colonisation from a symptomatic infection needing treatment.
Collect an appropriate specimen before treatment when feasible and assess obstruction or device complications.
Remove or replace an unnecessary catheter according to clinical guidance.

Wounds, burns and diabetic foot infection

Clean, assess depth and obtain appropriate specimens; superficial swabs may not represent deeper infection.
Look for abscess, necrosis, foreign body, osteomyelitis, poor perfusion or need for debridement.
Do not use prolonged antibiotics as a substitute for wound care, off-loading, drainage or surgery.

20. Patient and caregiver education

Explain that antibiotics treat selected bacterial infections and do not treat most viral colds or flu.
Explain the exact dose, route, timing, duration and what to do if a dose is missed or vomited.
Tell the patient not to share, save, sell or use leftover antimicrobials.
Explain common adverse effects and urgent symptoms such as breathing difficulty, facial swelling, severe rash, persistent vomiting or severe diarrhoea.
Use teach-back: ask the patient to repeat the plan in their own words.
Discuss adherence and access barriers without blame; arrange follow-up or referral when possible.
Encourage vaccination, hand hygiene, safe water, food hygiene, safer sex and appropriate wound care.
Tell the patient when to return urgently: worsening fever, confusion, breathlessness, reduced urine, persistent vomiting, severe pain or inability to take treatment.

Communication example: “This medicine is being used because your assessment suggests a serious bacterial infection. We will review the results and your response. Do not share it or save it for another illness. Tell us immediately if you develop breathing difficulty, swelling, a severe rash, persistent diarrhoea or worsening weakness.”

21. AMR prevention checklist for emergency personnel

At every patient contact	During antimicrobial care	At handover/discharge
Perform hand hygiene and use risk-based PPE.	Confirm indication, allergy and previous exposure.	State medicine, dose, route, time and response.
Assess infection and non-infectious alternatives.	Collect appropriate specimen when feasible.	Communicate pending cultures and review date.
Clean equipment and protect the next patient.	Use guideline-based drug, dose, route and duration.	Explain adherence, adverse effects and return precautions.
Ask about recent admission, surgery and resistant organisms.	Monitor therapeutic response and toxicity.	Document allergies, cultures and prior resistance.
Prevent cross-transmission and isolate when required.	Stop, narrow, switch or escalate after review.	Report suspected outbreak, ADR or medication error.

22. Clinical scenarios and decision-making

Scenario 1 — Viral upper-respiratory symptoms: An adult has two days of runny nose, cough, normal oxygen saturation and no focal chest findings, but requests antibiotics. Reasoning: assess for danger and alternative diagnoses, explain why antibiotics may not help, provide supportive advice and safety-net instructions, and avoid prescribing solely to satisfy pressure.

Scenario 2 — Septic shock after recent admission: A patient is hypotensive, confused and febrile after a recent hospital stay and broad-spectrum antibiotic course. Reasoning: initiate emergency sepsis care, communicate the healthcare exposure, collect cultures if feasible without delay, use local guidance and senior review, and plan early reassessment for resistant infection and source control.

Scenario 3 — Culture result arrives: The patient is improving on a broad IV combination, but the culture identifies a susceptible pathogen that can be treated with a narrower oral option. Reasoning: communicate the result, review indication and stability, de-escalate or switch route under authorised direction, and document the new plan.

Scenario 4 — Positive wound swab without infection: A chronic wound swab grows bacteria, but the patient has no fever, spreading redness, increased pain or systemic illness. Reasoning: distinguish colonisation from infection; do not treat the laboratory result alone. Focus on wound care, assessment and review.

Scenario 5 — Suspected device infection: A patient with a vascular catheter has fever and rigors during infusion. Reasoning: assess ABCDE, stop/secure the infusion as directed, obtain appropriate cultures, notify the team, inspect the device and do not rely on prolonged antibiotics without evaluating removal or source control.

Scenario 6 — Poor response after oral therapy: A vomiting patient has worsening infection after taking oral medicine at home. Reasoning: assess absorption, adherence, dose and diagnosis; stabilise the patient and seek an authorised route and revised plan rather than assuming resistance or repeating an unsafe oral dose.

Scenario 7 — Household transmission: Two family members develop diarrhoea after unsafe water exposure; one has received antibiotics without testing. Reasoning: assess severity and dehydration, use infection prevention, consider public-health notification, obtain tests when indicated and avoid routine antibiotics without a clear indication.

Scenario 8 — Possible AMR outbreak: Several patients in one ward develop infections with similar resistance patterns. Reasoning: notify IPC and clinical leadership, reinforce isolation and cleaning, preserve specimens and records, review antimicrobial use and cooperate with surveillance and outbreak investigation.

23. Common misconceptions about AMR

Misconception	Correct understanding
“AMR means the patient is immune to antibiotics.”	The microorganism is resistant; the patient’s immune status and drug exposure also affect outcome.
“A stronger antibiotic is always better.”	The best medicine is the effective, appropriate, safest and narrowest option for the diagnosed infection.
“Stopping when better always creates resistance.”	Duration should follow the diagnosis and guideline; patients should not change a course without authorised advice.
“A positive culture always means treatment is needed.”	Colonisation and contamination must be distinguished from infection.
“Broad-spectrum antibiotics prevent deterioration in every fever.”	Unnecessary broad therapy causes harm and may delay correct diagnosis.
“Resistance is only a laboratory problem.”	Prescribing, administration, IPC, WASH, vaccination, agriculture and public behaviour all contribute.
“If the first antibiotic fails, simply add another.”	Reassess diagnosis, dose, route, adherence, source control, culture and local resistance.
“AMR is only found in big hospitals.”	Resistant organisms circulate in communities, clinics, hospitals, farms, food and the environment.

24. Examination and revision questions

Define antimicrobial resistance and explain why the microorganism, not the patient, is described as resistant.
Differentiate antibiotics, antivirals, antifungals, antiparasitics, antiseptics and disinfectants.
Explain intrinsic versus acquired resistance.
Describe mutation and selection pressure.
Explain conjugation, transformation and transduction.
List five mechanisms by which microorganisms resist antimicrobials.
What is the difference between colonisation, infection and contamination?
List patient, prescriber, facility, community, animal and environmental drivers of AMR.
Explain how poor infection prevention increases AMR.
What clinical features should raise suspicion of resistant infection?
Why must treatment failure not automatically be labelled resistance?
Define antimicrobial stewardship.
Explain empiric, targeted, prophylactic and suppressive therapy.
What is de-escalation and when may it be appropriate?
Why is diagnostic stewardship important?
List information that should be communicated during AMR-related handover.
What is the role of an antibiogram?
Describe the emergency approach to suspected sepsis in a patient at risk of AMR.
Explain the One Health approach to AMR.
List five actions an EMT can take to reduce antimicrobial resistance.

25. Key takeaways

AMR occurs when microorganisms no longer respond to antimicrobial medicines, increasing the risk of treatment failure, spread and death.
Resistance develops through mutation, selection pressure and transfer of genetic material.
Unnecessary exposure, poor adherence, incorrect dosing, weak diagnostics, poor-quality products and weak IPC all drive AMR.
Emergency care must balance immediate treatment of severe infection with cultures, stewardship, review and source control.
Every antimicrobial decision needs the right indication, drug, dose, route, timing, duration, monitoring and review.
Strong hand hygiene, isolation, cleaning, vaccination, safe water and device care prevent infections and reduce antibiotic use.
Uganda’s AMR response requires One Health coordination, surveillance, laboratory quality, stewardship and public participation.
EMTs are part of the AMR solution through accurate assessment, safe transport, medication history, specimen communication, IPC and patient education.

References and further study

Clinical note: This is an educational revision resource for emergency medical-care students. It does not replace current Ugandan treatment guidelines, laboratory advice, antimicrobial protocols, prescriptions, infection-control policies or specialist review. In a deteriorating patient, stabilise ABCDE and seek urgent senior clinical help while applying antimicrobial and infection-prevention principles.

Antimicrobial Resistance (AMR): Mechanisms, Clinical Impact & Stewardship Read More »

Emergency Pharmacology: Introduction, Legal Aspects, Classification, Pharmacokinetics & Pharmacodynamics

Why this lesson matters: In emergency care, a medicine may prevent death, restore a failing physiological function, relieve suffering or create immediate harm when it is selected, calculated, prepared, administered or monitored incorrectly. An emergency medical technician must therefore understand not only the name of a drug, but also the patient, the indication, the route, the expected effect, the time course, the important contraindications and the legal limits of practice.

Learning outcomes

By the end of this lesson, the emergency medicine student should be able to:

Define pharmacology, pharmacotherapeutics, pharmacokinetics, pharmacodynamics, toxicology and clinical pharmacology.
Explain why pharmacology is central to safe emergency assessment and treatment.
Describe the main legal, ethical and professional controls governing medicines in Uganda.
Differentiate chemical, generic and brand names and use generic names accurately.
Classify medicines by source, therapeutic use, body system, mechanism, legal status, route and dosage form.
Explain absorption, distribution, metabolism and excretion (ADME), including first-pass effect, bioavailability, protein binding, half-life, clearance and steady state.
Explain receptor action, agonists, antagonists, dose–response relationships, potency, efficacy, therapeutic index and adverse effects.
Recognise patient and emergency factors that change a drug response and identify when senior clinical or pharmacy support is required.
Apply a structured safety check to a medicine order before administration and respond appropriately to a medication error or suspected adverse drug reaction.

1. What is emergency pharmacology?

Pharmacology is the scientific study of drugs and their interactions with living organisms. It includes the origin, properties, actions, movement, uses and harmful effects of medicines. Emergency pharmacology applies this knowledge to rapidly changing conditions such as shock, trauma, respiratory failure, acute coronary syndromes, seizures, poisoning, anaphylaxis, severe pain and cardiac arrest.

Emergency medicines are often given when there is little time for trial and error. The clinician must make a time-critical decision while considering airway, breathing, circulation, disability, exposure, the likely diagnosis, allergies, pregnancy, kidney and liver function, current medicines and the patient’s ability to absorb or respond to treatment.

Pharmacology is not memorising drug lists. A safe emergency practitioner connects five questions: Why is this medicine needed? Is it safe for this patient? What dose and route are authorised? What effect should occur and when? How will I monitor and respond?

Important branches of pharmacology

Branch	Main question	Emergency-care example
Pharmacokinetics (PK)	What does the body do to the drug?	How quickly an IV medicine reaches the circulation and how kidney failure prolongs its effect.
Pharmacodynamics (PD)	What does the drug do to the body?	How a receptor agonist raises heart rate or relaxes bronchial smooth muscle.
Pharmacotherapeutics	How are medicines used to prevent, diagnose or treat disease?	Selecting a medicine for bronchospasm, pain, hypoglycaemia or seizure.
Toxicology	What harmful effects occur after exposure?	Recognising opioid respiratory depression or pesticide poisoning.
Clinical pharmacology	How do pharmacological principles apply to patients?	Adjusting treatment for age, pregnancy, shock, renal impairment or polypharmacy.
Pharmacovigilance	How are medicine-related harms detected and prevented?	Reporting a serious unexpected reaction or a recurring administration error.

2. Why pharmacology is essential in emergency medicine

Time is critical: a delayed medicine may allow hypoxia, shock, seizure activity or anaphylaxis to worsen.
Physiology is unstable: perfusion, acid–base status, temperature and organ function can change within minutes.
Routes affect speed: IV, intraosseous, intramuscular, inhaled, sublingual, buccal, oral, rectal and topical routes do not produce the same onset.
Many emergency medicines are high-alert: a small error in concentration, dose or route can cause severe harm.
Patients are frequently unable to provide a history: allergy, pregnancy, chronic medicines and substance use may be unknown.
Polypharmacy is common: a patient may already have taken medicines at home, received treatment from another facility or use traditional/herbal products.
Every medicine has a benefit–risk balance: the correct medicine can be life-saving, while an unnecessary medicine can mask deterioration or create a new emergency.

EMT medication-thinking mnemonic — A SAFE DRUG:
Assess the patient and indication Screen allergies and contraindications Authorised order and scope Five-plus rights check Exact concentration and calculation Document before leaving the patient Reassess the response Unexpected effects reported Guard the medicine and patient.

3. Basic terms every emergency student must know

Term	Meaning	Clinical teaching point
Drug	A chemical or biological substance that alters a biological function when introduced into an organism.	Not every drug is a medicine; some are used for diagnosis, prevention or investigation and some are toxic.
Medicine	A prepared product intended to prevent, diagnose, treat or relieve disease or symptoms.	It contains active ingredient(s), excipients and a dosage form such as a tablet, injection or inhaler.
Active pharmaceutical ingredient (API)	The component responsible for the intended pharmacological effect.	Different brands may contain the same API and strength.
Indication	The clinical reason for using a medicine.	The indication must match the patient’s problem; a familiar drug is not automatically appropriate.
Contraindication	A condition in which a medicine should not be used because the risk outweighs benefit.	Some are absolute; others require specialist judgement or dose adjustment.
Precaution	A condition requiring additional assessment, monitoring or modification rather than automatic avoidance.	Examples include pregnancy, asthma, renal impairment, dehydration or a history of allergy.
Adverse drug reaction (ADR)	A harmful and unintended response occurring at normal doses used for treatment, prevention or diagnosis.	Record, treat, report and prevent recurrence.
Side effect	A known secondary effect that may occur at therapeutic doses.	A side effect may be predictable and mild, but it can still become dangerous in a vulnerable patient.
Toxicity	Harm produced by excessive exposure, accumulation, unusual sensitivity or a poisonous substance.	Consider dose, concentration, route, timing, kidney/liver function and interactions.
Half-life (t½)	Time required for the plasma concentration or amount of a drug to fall by 50% during the relevant elimination phase.	It influences dosing intervals and how long an adverse effect may persist.
Therapeutic index	A comparison between toxic and effective exposure.	Narrow-therapeutic-index medicines require careful calculation, monitoring and documentation.

4. Medicines and the Ugandan legal framework

Emergency medical care takes place inside a regulated health system. In Uganda, the National Drug Policy and Authority Act, Cap. 206, established the National Drug Authority (NDA) and provides the framework for controlling the quality, importation, distribution, supply, prescription and appropriate use of medicines. The NDA also publishes medicine guidelines, registers products and regulates licensed outlets. Students must use the current law, institutional policy and professional-council requirements in force at the time of practice.

Legal update for students: Uganda has enacted a National Drug and Health Products Authority Act, 2026, but the publicly available legal record indicates that it had not yet commenced at the time this lesson was prepared. Always check the commencement notice and your facility’s current circulars; do not assume a proposed or enacted-but-uncommenced law has already replaced the operational framework.

The legal framework is designed to protect the public from substandard, falsified, expired, unregistered, misused and improperly supplied medicines. It does not remove the individual practitioner’s duty to assess the patient, follow a lawful order, work within competence and report harm.

Legal controls that affect emergency practice

Product authorisation: use medicines obtained through lawful supply chains and approved or authorised for use in Uganda, unless a recognised emergency-use pathway applies.
Licensing of premises and suppliers: medicine storage, dispensing and distribution are performed through licensed systems; emergency personnel should not source medicines from informal sellers.
Restricted and controlled medicines: some medicines have stricter requirements for prescription, custody, registers, stock reconciliation, administration, wastage and witnessing.
Prescription and order validity: an order should be legible, complete, dated, attributable to an authorised prescriber and clinically appropriate. If it is unclear or unsafe, stop and clarify.
Storage and quality: temperature, light, humidity, security, expiry date, integrity of packaging and cold-chain requirements are part of safe practice.
Documentation and traceability: the patient, medicine, dose, route, time, person giving it, response and any variance should be traceable.
Pharmacovigilance: suspected serious or unusual medicine-related harm should be escalated and reported through the facility and national reporting channels.
Advertising and claims: health workers must not make unsupported claims or promote prescription medicines in ways that breach professional or regulatory rules.

Legal versus ethical responsibility

Situation	Legal/professional duty	Ethical duty
Unclear order: “give adrenaline” without concentration, route or indication	Do not guess; clarify with the authorised prescriber or senior clinician.	Prevent avoidable harm while preserving timely care.
Patient is unconscious and no history is available	Act under emergency protocols and document the assessment and rationale.	Provide necessary care while respecting the patient’s best interests.
Medicine error is discovered after administration	Stabilise, notify the responsible clinician and follow incident-reporting policy.	Be truthful, protect the patient and support learning rather than concealment.
Patient refuses a medicine	Assess capacity, explain consequences, document refusal and seek senior advice.	Respect autonomy while preventing coercion and ensuring informed choice.

5. Scope of practice, delegation and accountability

A student or EMT must know the difference between being present, being trained, being authorised and being accountable. A skill taught in class is not automatically authorised in every clinical setting. The practitioner must work under the relevant professional council, facility protocol, medical direction and emergency-care standing orders.

Do not independently prescribe, alter a prescription, substitute a medicine or give an unfamiliar preparation outside your legal scope.
Confirm which medicines may be administered under a standing order, protocol or direct verbal order.
When a verbal order is permitted in a genuine emergency, repeat it back, confirm the patient and drug details, administer according to protocol, and obtain timely written confirmation.
Never sign for a medicine administered by another person. Each practitioner records their own action.
Ask for help when the patient’s condition, medicine, calculation, route or equipment is beyond competence.
Delegation transfers a task, not the duty to ensure that the person is trained, supervised and supported.
Maintain confidentiality: medication history, diagnosis, toxicology and errors are shared only with people who need the information for care, safety or lawful reporting.

Clinical reasoning scenario: A patient with wheezing is deteriorating. A relative produces an unlabelled bottle and says it is the patient’s “usual injection.” The correct action is not to administer it because the relative is confident. Secure the bottle, identify the patient, assess ABCDE, seek a lawful order and use an identifiable, authorised medicine from the emergency supply. An unknown preparation has unknown concentration, expiry, sterility, interactions and legal traceability.

6. How medicines are named

Name	Explanation	Example of how it matters
Chemical name	Describes the molecular structure using chemical nomenclature.	Useful in chemistry and research but usually impractical for a drug chart.
Generic name (non-proprietary name)	The standard name assigned to the active medicine.	Reduces confusion between brands and supports rational procurement and teaching.
Brand/trade name	Name chosen by a manufacturer for marketing.	Two different brand names may contain the same active ingredient.
Official name	Name recognised by an official pharmacopoeia or national formulary.	Supports standardisation and quality assurance.

Student rule: Learn the generic name, strength, dosage form, usual emergency indication, major contraindications, high-risk effects and monitoring requirements. Use the brand only to identify the product at hand.

7. Classification of medicines

Classification is a way of organising medicines so that their properties, uses and risks can be understood. One medicine can belong to several classifications at the same time. For example, salbutamol is a synthetic medicine, a bronchodilator, a respiratory-system medicine, a selective beta-2 agonist and an inhaled preparation.

7.1 Classification by source

Natural: obtained from plants, animals, minerals or microorganisms, for example some alkaloids, hormones, vaccines and antibiotics.
Semi-synthetic: a natural molecule chemically modified to improve activity, stability, absorption or safety.
Synthetic: produced through chemical synthesis.
Biological and biotechnology-derived: vaccines, monoclonal antibodies, recombinant proteins, blood products and other products made from living systems.

7.2 Classification by therapeutic purpose

Purpose	Function	Examples of emergency relevance
Preventive	Reduces the chance of disease or complication.	Vaccines, post-exposure prophylaxis and thrombosis prevention where authorised.
Diagnostic	Assists identification or measurement of disease.	Contrast media, diagnostic dyes and some challenge tests.
Curative/etiological	Acts on the cause of disease.	Antimicrobials for a confirmed or strongly suspected infection under protocol.
Symptomatic	Relieves a symptom without necessarily removing the cause.	Analgesics, antiemetics and antipyretics.
Replacement	Replaces a deficient substance.	Glucose, electrolytes, hormones and blood products under authorised indications.
Supportive/resuscitative	Supports a failing physiological function.	Fluids, oxygen, vasopressors and medicines supporting cardiac or respiratory function.
Palliative	Relieves suffering and improves comfort.	Carefully titrated analgesia, antiemetics and symptom control.

7.3 Classification by body system

Examples include cardiovascular, respiratory, nervous-system, endocrine, gastrointestinal, urinary, reproductive, musculoskeletal, anti-infective, dermatological and haematological medicines. This approach helps students link a medicine to anatomy and disease, but it can be misleading because one medicine may act on more than one system.

7.4 Classification by pharmacological action

Agonists: activate a receptor to produce a response.
Antagonists: bind to a receptor and reduce or block the action of an agonist.
Enzyme inhibitors: slow or block an enzyme-mediated reaction.
Ion-channel modulators: alter movement of ions such as sodium, calcium, potassium or chloride.
Hormone or receptor replacement: supplies a substance or mimics a physiological signal.
Osmotic agents: change water movement by altering osmotic pressure.
Anti-infectives: inhibit or kill bacteria, viruses, fungi or parasites.
Immunomodulators: increase, decrease or redirect immune activity.

7.5 Classification by legal supply status

National law and medicine schedules determine which products require a prescription, which may be supplied through authorised outlets, and which require special controls. Categories may include prescription-only medicines, pharmacy or professional-supply medicines, over-the-counter medicines, controlled or narcotic medicines, and restricted medicines. The exact schedule and permitted prescriber or dispenser must be checked in current Ugandan law, the National Formulary and institutional policy.

Do not confuse “available in an emergency tray” with “free to use.” A medicine can be physically present but still require an authorised order, protocol indication, expiry check, witnessing, controlled-drug register entry or senior review.

7.6 Classification by route and dosage form

Route/form	Strengths	Important limitations and hazards
Oral tablets, capsules and liquids	Convenient, usually safe and economical.	Slow or unreliable during vomiting, shock, reduced consciousness, ileus or aspiration risk.
Sublingual/buccal	Rapid absorption and avoids much first-pass metabolism.	Requires cooperation and intact mucosa; do not swallow or chew unless directed.
Intravenous	Immediate bioavailability and precise titration.	Rapid toxicity, dosing errors, extravasation, infection and incompatibility risk.
Intraosseous	Rapid access when IV access is difficult in critical illness.	Requires trained insertion, correct device use and monitoring for complications.
Intramuscular/subcutaneous	Useful when oral or IV routes are unsuitable.	Absorption may be poor in shock; bleeding, pain, nerve injury or tissue injury may occur.
Inhaled/nebulised	Targets the respiratory tract and can act quickly.	Technique, device, respiratory effort and aerosol precautions affect delivery.
Rectal	Alternative when oral route is unavailable; may be useful for some anticonvulsants or antipyretics.	Absorption is variable; dignity, consent, bleeding and local contraindications matter.
Topical/transdermal	Local effect or slow sustained systemic delivery.	Damaged skin, heat, occlusion and dose stacking can alter absorption.

8. Medication safety before pharmacology becomes practice

Medication safety is a system of checks, communication and monitoring rather than a single memory trick. WHO identifies prescribing, transcribing, dispensing, administration and monitoring as stages at which errors can occur. High-alert medicines, transitions of care, polypharmacy, look-alike/sound-alike names, interruptions and poor environmental conditions increase the risk.

The emergency medication safety check

Identify the patient: use at least two identifiers according to facility policy. Never identify a patient by bed number alone.
Confirm the indication: link the medicine to the clinical problem and current assessment.
Check the order or protocol: medicine, concentration, dose, route, frequency or repeat instructions, prescriber and date/time.
Check allergies and previous reactions: ask the patient, relatives, record and team; distinguish a side effect from a true allergy when possible.
Check the product: generic name, strength, dosage form, expiry date, batch, packaging integrity, clarity and storage conditions.
Calculate and measure: write the calculation, confirm units and use an independent double-check for high-alert medicines.
Check route and equipment: compatible line, dilution, flush, device, oxygen source, nebuliser, infusion pump or monitoring equipment.
Explain and obtain cooperation: tell the patient what is being given, why, expected effects and important symptoms to report, unless immediate life-saving treatment makes explanation impossible.
Administer safely: remain with the patient when appropriate and do not leave an unlabeled syringe or prepared dose unattended.
Monitor and document: record the administration and reassess the patient’s response and adverse effects.

Rights of medication administration: right patient, right medicine, right indication, right dose, right route, right time, right documentation, right assessment, right response and right to refuse. The “rights” support clinical reasoning; they do not replace reading the order, checking the label or following local policy.

9. Pharmacokinetics: what the body does to a drug

Pharmacokinetics (PK) describes the time course of a medicine in the body. The classic framework is ADME: absorption, distribution, metabolism and excretion. PK helps explain onset, peak effect, duration, accumulation, toxicity and why the same dose can affect two patients differently.

Clinical translation: A drug may be correctly selected yet fail because it was not absorbed, did not reach the target, was rapidly metabolised, accumulated because clearance was poor, or was given by a route that did not match the emergency.

9.1 Liberation

Before absorption, the active ingredient must be released from its dosage form. A tablet disintegrates and dissolves; a modified-release product is designed to release medicine gradually; an injection is already in solution or suspension. Crushing a modified-release or enteric-coated preparation may cause dose dumping, toxicity or loss of protection. Never crush or split a product unless the label, pharmacist or protocol confirms that it is safe.

9.2 Absorption

Absorption is movement of a drug from its site of administration into the systemic circulation. It is influenced by blood flow, surface area, membrane permeability, lipid solubility, pH, formulation, gastric emptying, intestinal motility and interactions with food or other medicines.

Factor	Effect on absorption	Emergency example
Blood flow	Higher perfusion generally increases uptake; poor perfusion delays uptake.	IM absorption can be unreliable in severe shock or peripheral vasoconstriction.
Surface area	Larger absorptive surface usually permits more uptake.	The small intestine is important for many oral medicines.
Gastrointestinal motility	Changes in transit alter time available for absorption.	Vomiting, ileus or severe diarrhoea can make oral dosing unreliable.
pH and ionisation	Un-ionised, lipid-soluble molecules often cross membranes more readily.	Changes in gastric pH or antacid use can alter some medicines.
Food and binding	Food can delay, reduce or increase absorption; some medicines bind to minerals.	Always check whether a medicine should be given with food or separated from iron/calcium.
Formulation	Solutions usually act faster than tablets; modified-release products act longer.	Do not substitute dosage forms casually in an emergency.

Routes and relative bioavailability

Bioavailability (F) is the fraction of an administered dose that reaches systemic circulation in active form. IV administration is considered 100% bioavailable. Oral medicines may have lower bioavailability because of incomplete absorption, degradation in the gut or first-pass metabolism.

Route	Usual onset pattern	First-pass effect	Key emergency caution
IV	Fastest; effect may begin within seconds to minutes.	Bypassed.	Small errors may cause immediate severe toxicity; give slowly when required and monitor.
IO	Rapid systemic access in critical illness.	Bypassed.	Use only trained protocols and confirm patency.
IM	Minutes; varies with perfusion and formulation.	Mostly bypassed.	May be delayed in shock; consider bleeding risk and site safety.
Oral	Usually slower and variable.	Often present.	Unsafe or ineffective in unconscious, vomiting or aspiration-risk patients.
Sublingual/buccal	Rapid when mucosa is intact.	Reduced or bypassed.	Do not give if the patient cannot protect the airway or follow instructions.
Inhaled	Rapid local respiratory effect.	Variable; much of swallowed fraction may be oral.	Device technique and patient effort determine delivered dose.

First-pass metabolism

After an oral dose, absorbed medicine from the gut enters the portal circulation and may be metabolised in the intestinal wall and liver before reaching systemic circulation. This is the first-pass effect. A large first-pass effect lowers bioavailability and can make oral dosing very different from IV dosing. Sublingual, buccal, transdermal, inhaled and parenteral routes may reduce or bypass part of this effect.

9.3 Distribution

Distribution is the reversible movement of a drug from blood into tissues and body fluids. It depends on blood flow, capillary permeability, lipid solubility, tissue binding, plasma-protein binding and barriers such as the blood–brain barrier.

Highly perfused organs—brain, heart, liver and kidneys—often receive drug earlier than muscle, fat and poorly perfused tissue.
Low albumin can increase the free fraction of highly protein-bound drugs and potentially increase effect or toxicity.
Acidosis, hypothermia, shock and altered membrane permeability may change distribution in critically ill patients.
Fat-soluble medicines may accumulate in adipose tissue and have a longer apparent duration.
Large fluid shifts, oedema, ascites, burns and aggressive fluid resuscitation can change the volume in which a medicine distributes.

Protein binding and free drug

Many medicines bind reversibly to albumin or other plasma proteins. The bound fraction is usually not readily able to cross membranes or interact with receptors; the unbound fraction is available for distribution, action, metabolism and excretion. A low total plasma concentration does not always mean low pharmacological activity if the free fraction is increased.

Body barriers

Barrier/compartment	Why it matters
Blood–brain barrier	Restricts many polar medicines; inflammation, age and certain diseases may alter penetration.
Placenta	Many medicines cross to the fetus. Pregnancy requires a benefit–risk assessment and specialist guidance.
Breast milk	Some medicines enter milk; consider the infant’s age, prematurity and vulnerability.
Testes and other protected tissues	Special barriers may limit distribution and affect treatment of infection or inflammation.

9.4 Metabolism (biotransformation)

Metabolism chemically changes a medicine, commonly in the liver, to make it easier to eliminate. It may inactivate a drug, activate a prodrug, produce an active metabolite or produce a toxic metabolite. The intestine, kidneys, lungs, plasma and other tissues can also contribute.

Stage	Typical reaction	Clinical meaning
Phase I	Oxidation, reduction or hydrolysis, often involving cytochrome P450 enzymes.	May inactivate the medicine, activate a prodrug or create a reactive metabolite.
Phase II	Conjugation such as glucuronidation, sulfation or acetylation.	Often produces a more water-soluble metabolite for excretion, though exceptions occur.

Enzyme induction increases enzyme activity over time and may reduce the effect of some medicines. Enzyme inhibition decreases metabolism and may increase concentration and toxicity. Interactions can occur with prescription medicines, alcohol, herbal products, food and environmental exposures.

Liver factors that alter metabolism

Reduced hepatic blood flow may lower delivery of high-extraction medicines to the liver.
Hepatocellular injury may reduce metabolic capacity.
Low albumin can increase the free fraction of protein-bound medicines.
Neonates have immature enzyme pathways; older adults may have reduced reserve and polypharmacy.
Sepsis, hypoxia, fever, hypothermia and major trauma can change enzyme activity and perfusion.
Drug interactions may become more dangerous when several medicines compete for the same enzyme or transport system.

9.5 Excretion

Excretion removes unchanged medicine or metabolites from the body. The kidneys are the major route for many water-soluble products, but bile and faeces, lungs, sweat, saliva and breast milk can also contribute.

Renal process	Explanation	Clinical relevance
Glomerular filtration	Unbound drug passes from plasma into the renal filtrate.	Low renal perfusion or low filtration can reduce elimination.
Tubular secretion	Transporters actively move selected drugs from blood into the tubule.	Drugs may compete for transporters and alter one another’s clearance.
Tubular reabsorption	Some drugs move back from urine into blood, influenced by lipid solubility and urine pH.	Urine alkalinisation or acidification may matter in selected poisonings under specialist protocol.

Before giving a renally cleared medicine, look for urine output, kidney history, creatinine/eGFR when available, dehydration, age and nephrotoxic co-medications. Emergency treatment should not be delayed for a laboratory result when a time-critical indication exists, but the result should guide subsequent dosing and monitoring.

10. Pharmacokinetic measurements used in emergency care

Parameter	Meaning	Why an EMT should care
Onset	Time from administration to initial clinically detectable effect.	Guides reassessment and prevents premature repeat dosing.
Peak	Time or concentration at the greatest effect or highest plasma level.	Helps anticipate adverse effects and assess whether treatment has worked.
Duration	How long the clinically useful effect lasts.	A short-acting medicine may need repeat dosing or infusion; a long-acting one may continue after transfer.
Clearance (CL)	Volume of plasma from which drug is completely removed per unit time.	Reduced clearance can produce accumulation and toxicity.
Volume of distribution (Vd)	An apparent volume relating the amount of drug in the body to the plasma concentration.	Large Vd may require a larger loading dose but does not mean the patient has a large physical fluid volume.
Half-life (t½)	Time for concentration to decrease by half during elimination.	Usually affects dosing interval and time to wash out after stopping.
Steady state	Approximate balance between drug entering and leaving during repeated dosing or infusion.	Many medicines require several half-lives to approach a stable concentration.
Bioavailability (F)	Fraction reaching systemic circulation unchanged.	Route changes may require a different dose or careful monitoring.

Half-life and accumulation

For many drugs with first-order elimination, about one half-life removes 50% of the amount, two half-lives remove about 75%, three remove about 87.5%, four about 93.75% and five about 96.9%. These are teaching approximations, not a promise for every patient or every drug.

Clinical interpretation: a patient who receives repeat doses before the previous dose has been eliminated may accumulate medicine. Accumulation is more likely when the dosing interval is short, the half-life is long, kidney/liver function is poor, or the dose is excessive.

Loading dose and maintenance dose

Loading dose: a larger initial dose used to reach a target concentration more quickly, especially when the medicine has a large volume of distribution or a long half-life.
Maintenance dose: a repeated dose or infusion intended to replace what is eliminated and maintain the desired effect.
Loading dose is influenced more by volume of distribution and target concentration; maintenance dose is influenced more by clearance and dosing interval.
Never calculate or give a loading dose from memory when a protocol, weight, concentration or patient factor is uncertain. Use a verified reference and an independent check.

First-order and zero-order elimination

Pattern	What is removed	Teaching point
First-order	A constant proportion per unit time.	Most medicines follow this pattern within usual therapeutic ranges; the half-life is relatively predictable.
Zero-order	A constant amount per unit time because elimination pathways are saturated.	Small dose increases may produce disproportionate rises in concentration and toxicity.

11. Pharmacodynamics: what a drug does to the body

Pharmacodynamics (PD) describes the biochemical and physiological effects of a medicine, including receptor binding, signal transduction, dose–response relationships, therapeutic effects and adverse effects. PK determines exposure at the site of action; PD determines what that exposure does.

PK versus PD: PK = the patient changes the drug. PD = the drug changes the patient.

11.1 Drug targets

Target	How a medicine acts	Emergency relevance
Receptor	Binds and activates, blocks or modulates a signalling protein.	Bronchodilation, analgesia, sedation, vasoconstriction and reversal of toxicity.
Enzyme	Inhibits or stimulates an enzyme and changes production or breakdown of a mediator.	Changes inflammation, coagulation, blood pressure or neurotransmitter activity.
Ion channel	Opens, closes or blocks a channel controlling membrane excitability.	Alters cardiac rhythm, seizure activity, nerve conduction or muscle contraction.
Transporter/pump	Changes movement of a substance across a membrane.	Affects neurotransmitters, electrolytes, gastric acid or renal handling.
Nucleic acid/ribosome	Changes genetic expression or protein synthesis.	Important for anti-infectives and some anticancer medicines.
Physical/chemical target	Acts through osmotic, neutralising, chelating or barrier effects rather than a receptor.	Fluids, antacids, adsorbents and selected antidotes.

11.2 Agonists, antagonists and modulators

Full agonist: activates a receptor and can produce the maximum response of that system.
Partial agonist: activates the receptor but produces a lower maximum response, even when all receptors are occupied.
Competitive antagonist: competes at the same receptor site; increasing agonist concentration may overcome the block in a simplified model.
Non-competitive or irreversible antagonist: reduces the available receptor response in a way that may not be overcome by more agonist.
Allosteric modulator: binds at another site and changes receptor response to the natural mediator or agonist.

11.3 Dose–response relationship

A dose–response curve links the amount or concentration of a medicine to the intensity of an effect. As dose rises, response usually increases until a ceiling is reached. Beyond the useful range, adverse effects may rise without additional benefit.

Concept	Meaning	Common exam mistake
Potency	Amount or concentration required to produce a specified effect.	Assuming the more potent medicine is automatically better or safer.
Efficacy	Maximum effect a medicine can produce in that system.	Confusing a high dose with a high maximum effect.
Affinity	Strength of attraction between a drug and its target.	Assuming binding alone guarantees a clinical response.
Selectivity	Preference for one target over others at therapeutic concentrations.	Forgetting that selectivity can decrease at high concentrations.
Therapeutic window	Concentration range where benefit is likely and toxicity is acceptably low.	Using a single “safe dose” without considering the patient and route.

12. Therapeutic index, adverse effects and safety margin

The therapeutic index compares the dose or concentration associated with toxicity with that associated with benefit. A wide therapeutic index generally gives more room for error; a narrow therapeutic index demands precise dosing and monitoring. The apparent safety margin changes with age, organ function, interactions, route and the patient’s disease.

Types of unwanted medicine effects

Effect	Description	Emergency response
Predictable side effect	Known secondary effect related to the pharmacology.	Assess severity, provide support, adjust or stop only under authorised direction.
Type A adverse reaction	Augmented, dose-related and often predictable from the drug’s action.	Withhold/adjust according to protocol, treat the effect and report when required.
Type B adverse reaction	Bizarre, unpredictable, often immune or idiosyncratic.	Stop exposure when appropriate, treat as an emergency and record the reaction clearly.
Allergic reaction	Immune-mediated response ranging from rash to anaphylaxis.	Assess ABCDE immediately and activate the anaphylaxis pathway for severe features.
Drug toxicity	Harm caused by excessive concentration, dose, accumulation or impaired elimination.	Stop further exposure, support ABCDE, identify product/time/amount and contact toxicology or senior support.
Drug interaction	Another medicine, food, disease or substance changes effect or exposure.	Check the full medication history and monitor for loss of effect or toxicity.
Withdrawal	Symptoms after abrupt reduction or stopping of a medicine to which the body has adapted.	Recognise the syndrome and seek a supervised plan; do not abruptly stop essential therapy without advice.

13. Factors that modify drug response

Two patients receiving the same dose may have very different plasma concentrations and clinical responses. Emergency students should assess patient factors before giving a medicine and continue reassessment after it is given.

Factor	How it can change PK/PD	Practical question
Age	Neonates have immature metabolism and renal function; older adults may have reduced clearance and increased sensitivity.	Is this a child, frail older adult or very elderly patient requiring weight-based/specialist dosing?
Body weight and composition	Changes distribution and dose calculations; obesity and oedema alter apparent volume.	Which weight does the protocol require: actual, ideal, lean or estimated?
Pregnancy	Changes plasma volume, renal flow, protein binding and enzyme activity; the fetus may be exposed.	Could the patient be pregnant, and is the indication time-critical?
Kidney disease	Reduces renal elimination and may alter fluid/electrolyte balance.	What is the urine output, kidney history and latest renal result if available?
Liver disease	May reduce metabolism, protein synthesis and detoxification.	Is there jaundice, ascites, chronic liver disease or bleeding tendency?
Shock and hypoperfusion	Changes absorption, distribution, metabolism and clearance; peripheral IM/SC absorption may be unreliable.	Is the chosen route dependable in this circulation?
Acid–base disturbance	Changes ionisation, protein binding and receptor response.	Could severe acidosis or alkalosis alter drug distribution or toxicity?
Temperature	Hypothermia may slow metabolism and alter enzyme, receptor and cardiovascular responses.	Could the patient be hypothermic, febrile or exposed?
Genetic variation	Enzyme and receptor differences can alter metabolism or response.	Unexpected response should prompt reassessment, not automatic repeat dosing.
Current medicines and substances	Interactions, additive sedation, enzyme effects and duplicate therapy may occur.	What has the patient taken today, including herbal products, alcohol and recreational drugs?
Psychological and social factors	Adherence, understanding, fear, access and cultural beliefs affect outcomes.	Can the patient understand and safely follow the plan after discharge or transfer?

14. Drug interactions

An interaction occurs when one medicine, substance, food or disease changes the effect or exposure of another. Interactions may be pharmacokinetic—changing ADME—or pharmacodynamic—changing the response without necessarily changing concentration.

Interaction type	Example pattern	Risk in emergency care
Absorption interaction	Binding in the gut, altered pH or changed gastric emptying.	Treatment failure or delayed onset.
Distribution interaction	Displacement from protein binding or altered tissue uptake.	Transient rise in free drug and toxicity in vulnerable patients.
Metabolic inhibition	One substance slows enzyme-mediated metabolism of another.	Unexpectedly high concentration or prolonged effect.
Metabolic induction	One substance increases enzyme activity over time.	Reduced effect and treatment failure.
Renal interaction	Changes filtration, secretion, reabsorption or renal perfusion.	Accumulation or kidney injury.
Additive effect	Two agents produce similar effects, such as sedation, hypotension or bleeding.	Respiratory depression, falls, shock or uncontrolled bleeding.
Antagonistic effect	One medicine reduces the action of another.	Failure of bronchodilation, analgesia, seizure control or resuscitation.
Synergistic effect	Combined effect is greater than expected from either medicine alone.	Severe toxicity despite apparently ordinary doses.

High-risk interaction example: A drowsy trauma patient has already received an opioid by a first team. A second team considers giving a sedative for agitation without obtaining the medication history. The combined central nervous system depression may worsen hypoventilation and airway obstruction. Reassess ventilation, obtain handover information and seek senior direction before adding another sedating medicine.

15. Tolerance, tachyphylaxis, dependence and withdrawal

Tolerance: a reduced response after repeated exposure, so a larger dose may be needed for the same effect. It may be pharmacokinetic or pharmacodynamic.
Tachyphylaxis: a rapid decrease in response after closely repeated doses.
Physical dependence: physiological adaptation in which abrupt cessation causes withdrawal symptoms.
Psychological dependence: compulsive craving or use despite harm; it is not identical to physical dependence.
Withdrawal: the predictable or dangerous syndrome that may follow abrupt reduction or stopping. Emergency care may require airway support, glucose, seizure precautions, fluids, antidote or specialist review depending on the substance.

16. Medicines in common emergency physiology

Shock and poor perfusion

Peripheral perfusion may be too poor for reliable IM or SC absorption.
Reduced liver and kidney blood flow can slow metabolism and clearance.
Hypoalbuminaemia, acidosis and fluid shifts can change free drug and distribution.
Hypotension and hypoxia increase sensitivity to sedatives, vasodilators and respiratory depressants.
Use the route and medicine specified by the emergency protocol, establish access according to scope, and reassess perfusion after every intervention.

Burns and major trauma

Early fluid shifts can change the volume of distribution; later oedema and altered protein binding may change exposure.
Damaged skin makes some topical or transdermal routes unreliable.
Pain, anxiety, hypothermia and inhalational injury alter physiological response to sedatives and analgesics.
Use weight, injury pattern, perfusion, renal function and repeated observation rather than a one-time assumption.

Pregnancy and breastfeeding

Treat life-threatening maternal illness promptly; maternal hypoxia and shock also endanger the fetus.
Check pregnancy status when it will change medicine choice, dose or monitoring, but do not delay life-saving treatment in a critical emergency.
Consider gestational age, placental transfer, fetal effects and breastfeeding exposure; consult an authorised prescriber or pharmacist.

Children and older adults

Children commonly require weight-based calculations, age-specific concentrations and a dose-volume check.
Never assume an adult concentration is safe for a child; look-alike syringes and decimal errors are dangerous.
Frailty, reduced renal function, polypharmacy and increased sensitivity make older adults vulnerable to hypotension, confusion, falls and sedation.

17. Safe medication calculations

Calculations must be verified using the actual product concentration and the authorised prescription or protocol. Write units at every step and obtain an independent check for high-alert medicines.

Common teaching formula:
Volume to give = (Prescribed dose ÷ Dose available) × Volume containing the dose available

Weight-based dose = dose per kg × patient weight in kg
Infusion rate = total volume ÷ total time
Always check whether the protocol specifies a maximum single dose, maximum daily dose, dilution, concentration, minimum age, repeat interval or renal adjustment.

Calculation safety checklist

Read the prescription aloud and identify the patient.
Write the prescribed dose and units exactly as ordered.
Write the concentration on the label and confirm whether it is per mL, per ampoule, per tablet or per vial.
Convert units only when necessary and write the conversion.
Calculate the volume and estimate whether it is clinically plausible.
Check the maximum dose and the patient’s weight, age, renal/liver status and allergy.
Ask another qualified practitioner to independently check high-alert calculations.
Label any prepared syringe or infusion and document the final dose given.

18. Clinical scenarios for EMT students

Scenario 1 — Unclear concentration: The order says “give 1 mL of adrenaline,” but the tray contains two concentrations. Reasoning: stop, identify the indication and protocol, confirm concentration, calculate the correct dose and obtain a second check. “1 mL” is not a complete dose.

Scenario 2 — Shock and IM absorption: A shocked patient has cold, clammy limbs and weak pulses. An IM medicine is considered. Reasoning: circulation may not deliver the dose reliably. Use the authorised emergency route and establish access according to protocol; do not assume the IM dose has failed and repeat it prematurely.

Scenario 3 — Reduced consciousness: A patient cannot swallow safely but has an oral prescription. Reasoning: protect the airway, do not force oral medicine, assess glucose and ABCDE, and seek an authorised alternative route.

Scenario 4 — Renal impairment: A patient with very low urine output needs a renally cleared medicine. Reasoning: the indication may still be urgent, but dose, interval and monitoring require senior or pharmacy review. Document kidney findings and reassess for accumulation.

Scenario 5 — Allergy history: The patient reports facial swelling after a previous medicine but cannot remember its name. Reasoning: treat the history as clinically significant until clarified, document the description, avoid the suspected product/class where possible and seek an alternative.

Scenario 6 — Post-administration deterioration: After a medicine, the patient becomes drowsy with slow breathing. Reasoning: treat it as a possible adverse effect or overdose: call for help, assess airway and breathing, provide support within scope, identify the medicine and time, monitor continuously, and report/document the event.

19. Responding to medication errors

A medication error may occur during prescribing, transcribing, dispensing, preparation, administration or monitoring. An error can occur even if no harm reaches the patient; near misses are valuable safety information.

Protect the patient first: stop the error or further exposure when safe and assess ABCDE.
Call for clinical help: do not manage a serious exposure alone.
Identify exactly what happened: patient, medicine, strength, amount, route, time, batch, symptoms and other medicines.
Provide monitoring and treatment: follow the relevant emergency or toxicology protocol.
Notify the responsible clinician and supervisor promptly.
Communicate honestly with the patient and family according to policy and senior guidance.
Document facts, not blame: use objective language, times, observations, actions and response.
Complete the incident and pharmacovigilance report through the approved system, even when the patient appears well.
Preserve evidence: keep the packaging, syringe, ampoule or record for investigation when instructed.

Never conceal a medication error. Delay in disclosure can delay treatment, increase harm and prevent the system from correcting the cause.

20. Documentation that supports safe pharmacology

Good documentation is a clinical handover, a legal record and a quality-improvement tool. Record enough information for another practitioner to understand what was considered, what was given and what happened next.

Document	Minimum useful content
Medicine administration record	Patient identifiers, generic name, dose, concentration, route, date/time, signature or electronic identity, and any required witness.
Emergency record	Indication, patient assessment, order/protocol, time prepared and given, response, vital signs and adverse effects.
Controlled-drug register	Stock balance, patient, medicine, strength, quantity, prescriber, administering practitioner, witness and wastage according to facility policy.
Handover	Medicine given, time, effect, remaining concerns, next due time, allergies, reactions and monitoring plan.
Incident/ADR report	Objective description of the event, product details, sequence, patient outcome, immediate actions and people notified.

21. High-yield comparison: pharmacokinetics versus pharmacodynamics

Question	Pharmacokinetics	Pharmacodynamics
Core phrase	What the body does to the drug.	What the drug does to the body.
Main processes	Absorption, distribution, metabolism and excretion.	Receptor binding, signal transduction and physiological response.
Main variables	Bioavailability, clearance, volume of distribution, half-life and concentration.	Potency, efficacy, affinity, selectivity and therapeutic index.
What changes it?	Route, perfusion, food, organ function, enzymes, age and body composition.	Receptor number, disease state, tolerance, genetics, age and interacting substances.
Emergency question	How quickly and for how long will the patient be exposed?	What effect should occur, how strong should it be and what toxicity should I watch for?

22. Examination and revision questions

Define pharmacology and explain how emergency pharmacology differs from general pharmacology.
Differentiate pharmacokinetics from pharmacodynamics using one emergency example for each.
What does ADME stand for?
Explain first-pass metabolism and name routes that partly bypass it.
Define bioavailability, clearance, volume of distribution and half-life.
Why can an intramuscular medicine be unreliable in severe shock?
Explain the difference between a generic name and a brand name.
Classify a medicine by source, therapeutic purpose, body system, mechanism, legal status, route and dosage form.
What is the difference between an indication, contraindication and precaution?
Describe the legal significance of the National Drug Policy and Authority Act in Uganda.
Why must students verify the current law, professional-council requirements and facility policy?
What is the difference between an agonist, partial agonist and antagonist?
Differentiate potency from efficacy.
What is a therapeutic window and why are narrow-therapeutic-index medicines high risk?
List ten rights or safety checks before administering an emergency medicine.
How can renal impairment lead to medicine accumulation?
Explain enzyme induction and enzyme inhibition.
List patient factors that can modify drug response in an emergency.
What immediate steps should follow a suspected medication error?
Why is documentation part of clinical care rather than clerical work?

23. Key takeaways

Pharmacology links a medicine’s identity, indication, legal status, route, dose, expected effect and potential harm.
PK follows the medicine through ADME; PD explains the response produced at the target.
Emergency physiology changes drug behaviour: shock, organ failure, age, pregnancy, burns, temperature and acid–base disturbance matter.
Classification helps organise medicines, but the same medicine can belong to several categories.
Generic names, verified concentrations and clear units reduce confusion.
Legal authority, scope of practice, standing orders and institutional policies must be checked before administration.
Medication safety requires identification, indication, allergy check, correct product, calculation, route, monitoring and documentation.
When an error occurs, protect the patient, call for help, document honestly and report through the correct system.

References and further study

Clinical note: This is an educational revision resource for emergency medical-care students. It does not replace a current Ugandan treatment guideline, authorised prescription, medical direction, pharmacist review, poison-centre advice or local institutional protocol. Always verify the current product label, concentration, patient-specific factors and scope of practice before administration.

Emergency Pharmacology: Introduction, Legal Aspects, Classification, Pharmacokinetics & Pharmacodynamics Read More »

Moving Patients: Lifting and Dragging Techniques

Why this matters: Moving a patient can save a life, but an unnecessary or poorly coordinated move can worsen spinal injury, bleeding, airway compromise, pain or disability—and can injure the rescuers. Emergency medical technicians must distinguish between a routine transfer, an urgent move and an emergency evacuation. The method depends on the danger, the patient's condition, the mechanism of injury, the available team and the equipment. The safest move is the minimum movement needed to remove immediate danger or deliver essential care.

Learning outcomes

By the end of this lesson, the emergency medical care student should be able to:

Explain why manual patient handling can injure both patients and healthcare workers.
Differentiate routine transfers, urgent moves and emergency drags/carries.
Perform a movement risk assessment before lifting, sliding, dragging or carrying a patient.
Use correct body mechanics, team communication and equipment preparation.
Describe safe techniques for a bed-to-stretcher transfer, assisted walking, sit-to-stand and floor-to-stretcher movement.
Describe emergency drags and carries used only when an immediate hazard makes delay unsafe.
Protect the head, neck and spine when trauma is suspected and use coordinated log-roll/slide methods.
Adapt movement for children, pregnancy, bariatric patients, burns, amputations and patients with lines or devices.
Reassess airway, breathing, circulation, consciousness, pain and neurovascular status after every move.
Document the reason for movement, method, personnel, equipment, patient response and any new finding.

Three categories of patient movement

Category	Definition	Example	Priority
Routine transfer	Planned movement when the patient and scene are stable.	Bed to wheelchair, stretcher to bed, repositioning for examination.	Safety, comfort, dignity and prevention of staff injury.
Urgent move	Movement needed soon because the patient's condition or environment is becoming unsafe.	Moving a deteriorating patient away from smoke or to an area for oxygen and monitoring.	Rapid ABCDE support while preserving alignment and equipment.
Emergency evacuation	Immediate movement because staying is more dangerous than moving.	Fire, traffic, structural collapse, violence, toxic gas or rising water.	Remove from danger using the fastest reasonably safe drag/carry; definitive examination follows.

Emergency-move rule: If there is no immediate danger, do not drag or carry a patient simply because it is faster. Stabilise, assess and use appropriate equipment. If there is immediate danger, move only far enough to reach safety, then stop and begin primary assessment.

Why unsafe lifting causes harm

Manual lifting and transferring exposes rescuers to awkward postures, sudden patient movement, friction, twisting and unpredictable loads. It can cause back, shoulder and musculoskeletal injuries. For the patient, an unplanned lift can cause a fall, skin shear, dislodged tubes, worsening pain, fracture displacement, bleeding or spinal movement.

Use assistive devices and additional staff whenever available and appropriate.
Do not assume a patient can be “lightly lifted” because they look small; a relaxed or unresponsive body is difficult to control.
Never lift a patient by the arms, neck, clothing around the throat or armpits.
A gait belt, slide sheet, scoop stretcher, transfer board, stretcher, wheelchair or mechanical hoist may reduce risk, but only when staff are trained to use it.
Stop if the plan is unsafe; ask for help rather than improvising a heroic lift.

The movement risk assessment

Question	What to decide
Why must the patient move?	Immediate danger, airway access, examination, treatment, transport, comfort or routine care?
Can the patient help?	Alertness, strength, balance, weight-bearing, pain, cooperation and ability to understand commands.
What injuries are possible?	Head/neck/spine, chest, abdomen, pelvis, long bone, burns, bleeding or unstable fracture.
How many staff are needed?	Assign enough people for the patient's size, condition and equipment; identify one leader.
What equipment is needed?	Stretcher, slide sheet, transfer board, scoop, vacuum mattress, draw sheet, wheelchair, gait belt, blankets and suction/oxygen.
What is the route?	Clear doors, floor, cables, wet areas, stairs, narrow spaces, traffic, crowds and destination surfaces.
What could fail?	Loss of balance, fall, line disconnection, pain, sudden collapse, fire, equipment failure or poor communication.

The movement plan: STOP–ASSESS–PREPARE–MOVE–CHECK

STOP–ASSESS–PREPARE–MOVE–CHECK
STOP: Do not rush into a lift.
ASSESS: Patient, injury, environment, staff and route.
PREPARE: Explain, clear, lock, position equipment and assign roles.
MOVE: On one leader's command; keep the body aligned and use devices.
CHECK: Airway, breathing, circulation, consciousness, pain, lines and neurovascular status.

Before touching the patient

Check scene safety and use PPE appropriate to blood, vomit, chemicals, smoke or violence.
Perform a rapid primary survey; never move a stable patient before knowing whether movement could worsen a life threat.
Explain the plan in simple language and ask the patient to report pain, dizziness, weakness or numbness.
Identify all lines, tubes, drains, monitoring leads, oxygen, splints and dressings.
Remove obstacles, lock wheels, lower/raise surfaces to a safe working height and prepare the destination.
Choose a team leader who gives one clear command; all staff move together.

Body mechanics for the rescuer

Technique	Safe practice	Reason
Base of support	Stand with feet apart and one foot slightly forward.	Improves balance and allows controlled movement.
Centre of gravity	Keep the patient/load close to your body and avoid reaching.	Reduces strain and loss of control.
Back and hips	Keep the spine neutral, bend at hips and knees, and use leg muscles.	Reduces excessive spinal flexion and shear.
Turning	Turn by stepping with the feet; do not twist the trunk while holding weight.	Prevents rotational injury to the rescuer and patient.
Hands	Use broad grips at the trunk/pelvis or approved handles; avoid joints and soft tissue.	Prevents skin injury, dislocation and nerve compression.
Communication	Use one leader and commands such as “ready—move—stop.”	Prevents sudden uncoordinated force.

When not to perform a manual lift

When a trained team or suitable device is not available for the patient's size or condition.
When the patient may have an unstable spine, pelvis or long-bone injury and the lift is not essential.
When the patient is too weak, confused, heavy or unpredictable to assist safely.
When the floor, stairs, smoke, traffic or equipment creates an uncontrolled hazard.
When the patient is attached to lines/tubes that have not been secured or disconnected by the appropriate clinician.

Assisted walking

Assisted walking is appropriate only when the patient is alert enough to follow instructions, can bear weight and has no injury or symptom making standing unsafe. It is not a test to decide whether an unconscious, faint, dizzy or severely breathless patient can move.

Assess dizziness, pain, strength, balance, footwear, blood pressure symptoms and the need for a walking aid.
Place non-slip footwear, clear the path and position a trained helper on the weaker side.
Use a gait belt if trained and indicated; do not pull on the patient's arm or neck.
Ask the patient to sit first, pause for symptoms, then stand on a clear count.
Walk at the patient's pace with short steps; keep the helper close without restricting normal movement.
If the knees buckle, lower the patient slowly to the nearest safe surface—do not try to hold the full body upright by the arms.

Sit-to-stand transfer

Step	Action	Safety check
1. Position	Place the chair/wheelchair close, lock brakes and remove footrests if appropriate.	Destination stable; path clear; shoes secure.
2. Explain	Tell the patient where to place feet and hands and agree on the command.	Patient understands and can participate.
3. Lean forward	Ask the patient to move to the edge and lean forward with the nose over the toes.	Do not pull the shoulders or lift under the arms.
4. Stand	Use a gait belt/approved support; the patient pushes from the surface while staff assist.	Keep your back neutral and do not twist.
5. Pivot	Small steps toward the destination; turn with the feet.	Monitor dizziness, knee buckling, pain and lines.
6. Sit	Back up until the legs touch the chair, reach for armrests and lower slowly.	Do not allow the patient to drop into the chair.

Bed-to-wheelchair transfer

Assess weight-bearing, balance, cognition, pain, lines/tubes and any spinal precautions.
Place the wheelchair at a slight angle on the patient's stronger side, lock both brakes and remove/flip footrests.
Raise the bed to a safe level, assist the patient to sit and pause for dizziness or hypotension.
Apply a gait belt when trained, ensure feet are flat and use the agreed stand/pivot command.
Pivot with small steps; do not twist or drag the patient's feet.
Lower slowly into the chair, replace footrests, position the patient and secure the lap belt if required by policy.
Recheck comfort, airway, breathing, circulation, pain, pressure areas and all equipment.

Bed-to-stretcher transfer

Use a slide sheet, transfer board, draw sheet or mechanical aid when available. A manual lift is not the default. Match the bed and stretcher height, lock both sets of wheels and assign staff to the head, trunk, pelvis and legs.

Method	Best use	Important precautions
Slide sheet/draw sheet	Horizontal lateral transfer of a patient who can remain aligned.	Use enough staff, protect skin and keep the sheet under the body rather than pulling on limbs.
Transfer board	Bridging a small gap for selected patients who can assist or be safely supported.	Protect the skin, secure surfaces and avoid use with unstable fractures unless trained.
Scoop stretcher	Picking up a supine trauma patient with minimal rolling.	Apply according to local protocol; check skin, alignment and fit.
Mechanical lift	Heavy, dependent or high-risk patients when the device and trained staff are available.	Check weight limit, sling size, attachment points and battery/equipment function.
Manual team lift	Only when necessary, trained and planned; not for routine heavy transfers.	Use a leader, broad grips, neutral alignment and enough personnel.

Horizontal transfer with a draw sheet

Explain the move, perform ABCDE and identify spinal precautions, painful areas and equipment.
Place the destination parallel and close; lock wheels and make surfaces level.
Use a rolled draw sheet under the patient from shoulders to thighs; keep the head supported.
Assign one person to the head and airway, one to the trunk/pelvis and others to the legs/equipment.
On the leader's count, shift the patient laterally using a coordinated weight transfer—do not lift individual limbs.
Unroll/remove the sheet safely, replace covers and reconnect equipment.
Reassess airway, breathing, circulation, consciousness, pain, skin and neurovascular status.

Repositioning an immobile patient in bed

Explain the plan and check for pain, fractures, drains, pressure injuries and lines.
Use a slide sheet or draw sheet; avoid pulling on the patient's arms or shoulders.
Keep the head, trunk and pelvis aligned when spinal injury is possible.
Use pillows to support the head, limbs and pressure areas; keep the airway visible.
After repositioning, check skin, breathing effort, pain, comfort, lines and call bell access.

Lifting a limb or partial lift

Lift only the part required for a procedure, dressing, splint or transfer. Support above and below an injured area, maintain the limb's alignment and use another helper for heavy or painful limbs. Never pull on a limb to “straighten” a suspected fracture or dislocation.

Team lifts

Role	Responsibility
Leader/head	Controls the head/neck when indicated, explains commands and watches airway/response.
Shoulder/trunk	Supports upper body and protects lines, tubes and injured chest.
Pelvis	Controls the centre of mass and protects pelvic/abdominal injuries.
Legs	Supports legs, splints, feet and lower-limb devices.
Equipment/observer	Checks wheels, sheets, oxygen, drains, route, bed height and destination.

Commands for coordinated movement

Use the same words every time. The leader should state the destination and action, wait for confirmation, then count. Example: “We are sliding the patient to the stretcher on three. Keep the head aligned. Ready? One, two, three—slide. Stop.” Any team member may say “stop” if they see pain, loss of alignment, equipment failure or a threat.

Emergency drags and carries: when they are justified

Dragging or carrying is reserved for situations in which remaining in place creates greater danger than movement—for example fire, smoke, collapsing structures, violence, traffic, flooding or an immediate chemical hazard. These techniques are not substitutes for a stretcher or trained transfer device. Move to the nearest safe area, then stop, assess and request definitive help.

Principles of an emergency drag

Check that the route and destination are safer than the current location.
Tell the patient what is happening if they are conscious; ask them to assist only if able.
Keep the patient's long axis aligned as much as possible, especially when spine injury is possible.
Protect the head and neck; avoid pulling on the head, neck or clothing around the throat.
Use the strongest safe grip at the shoulders, clothing across the upper trunk, sheet or ankles according to the method and training.
Pull in a straight line, use your legs, avoid twisting and stop when the patient reaches safety.
Immediately reassess ABCDE and treat life threats.

Blanket drag

A blanket drag can move a supine patient when a blanket or sheet is available and there is no time to use a stretcher. It offers more body support than pulling clothing alone.

Place or roll the patient onto a blanket only as safely as the emergency allows; keep the body aligned.
Fold the blanket around the patient or use the edges as a broad surface for traction.
Stand at the head or foot according to the direction of movement, keeping the head supported and visible.
Pull smoothly in a straight line toward safety; do not jerk or twist.
Once safe, lower the blanket, reassess and replace it with appropriate equipment.

Clothing drag

A clothing drag is a rapid technique for moving a supine patient when no equipment is immediately available. It may be useful in fire or immediate danger but can place stress on the neck and clothing seams.

Stand behind the patient's head, kneel and support the head between your forearms if possible.
Gather clothing at the shoulders/upper back—not around the neck—and support the head and neck.
Lift the upper torso slightly only enough to clear the ground, keeping the spine as straight as possible.
Drag backward using your legs and keep the patient aligned with the direction of travel.
Stop as soon as the hazard is cleared; perform a full assessment and replace torn clothing/cover the patient.

Shoulder drag

The shoulder drag may be used by a trained rescuer for a supine patient when the head and upper body can be supported. It is useful in narrow spaces but requires attention to the airway and neck.

Kneel behind the patient's head and place your hands under the shoulders or upper back.
Support the head between your forearms; do not pull the neck.
Keep your back as straight as possible, lean back and move using your legs.
Drag in the body's long axis and avoid rotating the patient.
Stop at safety, maintain airway access and begin the primary survey.

Ankle drag

An ankle or leg drag is a last-resort method for a patient who must be moved immediately and whose upper body cannot be reached safely. It offers poor head/neck protection and should not be used when a better method is available.

Use only when immediate danger prevents delay and no safer broad-support method is available.
Grasp both ankles or trouser cuffs securely; never pull on an injured limb if this can be avoided.
Keep the patient's body aligned and drag in a straight line, moving backward with your legs.
Watch for the head striking objects and stop as soon as the route is safe.
Perform a primary survey immediately; inspect for worsened injury or bleeding.

Firefighter drag

The firefighter drag is a trained rescue technique for moving a heavier or unconscious patient from a hazardous area. It uses the rescuer's body position to support the patient's upper body while the rescuer moves backward. It should be taught and practised under supervision; it is not appropriate for suspected spinal injury when other options are available.

Two-person seat carry

A two-person seat carry can move an alert patient who can sit and cooperate but cannot walk. It is not suitable for an unresponsive patient, severe chest/abdominal trauma, suspected spinal injury or a patient who cannot hold themselves upright.

Two rescuers kneel on either side of the seated patient.
Each rescuer places one arm behind the patient's back and the other under the patient's thighs or knees, forming a supported seat.
The patient may place arms around the rescuers' shoulders only if they can do so safely; never around the neck.
The leader counts, both rescuers stand together and walk in short coordinated steps.
Lower together on command and reassess for dizziness, pain and breathing difficulty.

Four-hand and two-hand seat carries

Carry	Patient requirement	Major caution
Four-hand seat	Conscious, cooperative patient able to sit upright and hold the rescuers' wrists.	Not for unconscious, spinal, pelvic or major limb injury.
Two-hand seat	Small/light cooperative patient able to support the trunk.	Requires strong trunk control; can be unstable on stairs or uneven ground.
Extremity carry	Patient who cannot walk but can be supported by two rescuers.	Do not pull injured limbs; avoid if fractures or spinal injury are suspected.
Chair carry	Patient who can sit while a chair provides support.	Secure chair, use enough staff and avoid stairs unless trained.

Chair carry

Place the patient in a sturdy chair with back support; secure them with a blanket or approved strap if policy permits.
One rescuer stands behind and controls the chair; another supports the front or legs.
Lift/tilt only on a clear command, keeping the chair stable and avoiding sudden backward movement.
Use a stair chair or evacuation device rather than an ordinary chair on stairs whenever available.
Check the patient's airway, breathing, circulation, pain, skin and straps throughout.

Human crutch or walking assist

A human crutch is for a conscious patient with a minor weakness who can bear weight and follow commands. The rescuer stands on the weaker side, supports the forearm or waist with a gait belt and matches the patient's pace. It is not appropriate for suspected fracture, severe dizziness, altered consciousness or collapse.

Emergency evacuation from a confined space

Control the hazard if possible without risking rescuers.
Use the shortest safe route and protect the head from beams, doorframes and debris.
Use a blanket, drag strap, rescue sheet or approved device whenever available.
Move one patient at a time unless a mass-casualty plan directs otherwise.
Once clear, mark the patient's location/triage status and begin ABCDE.

Moving a patient with suspected spinal injury

Suspect spinal injury after a significant mechanism, neck/back pain, midline tenderness, neurological symptoms, weakness, numbness, altered consciousness, intoxication that prevents reliable assessment or an associated distracting injury. Minimise movement, maintain manual in-line stabilisation and use a coordinated team. The airway takes priority: if it cannot be maintained, move the patient as necessary to open it.

Spinal movement precautions

Do	Do not
Keep head, neck and trunk aligned during rolls and transfers.	Do not twist the patient's neck to “see if it moves.”
Assign one person to control the head and lead commands.	Do not let different rescuers pull in different directions.
Use a scoop, vacuum mattress, slide sheet or approved device when available.	Do not manually lift a heavy patient without enough staff or equipment.
Reassess motor function, sensation, pulses, pain and airway after movement.	Do not assume a normal first neurological check excludes later deterioration.
Move only for safety, airway, essential treatment or transport.	Do not roll repeatedly for convenience or photography.

Log roll for assessment or device placement

Explain the plan, call for adequate staff and assign a head leader.
Align the patient's legs, place arms safely and secure loose equipment.
Place the destination board/sheet beside the patient and prepare suction/oxygen.
At the command, roll the head, shoulders, trunk and pelvis together.
Inspect the back or slide the device into place without unnecessary delay.
Return the patient as one unit, secure according to protocol and reassess immediately.

Scoop stretcher and vacuum mattress

Scoop stretcher: separates into two halves, allowing placement with less rolling; check alignment, locks, size and padding.
Vacuum mattress: moulds around the patient and can support transport; remove air and secure straps according to training.
Long board: may be used for extrication or short transfers under local protocol; prolonged time can increase pain and pressure injury.
Slide sheet: reduces friction during horizontal transfers; never use it as a restraint or substitute for team coordination.

Moving patients with oxygen, lines and tubes

Equipment	Before movement	After movement
Oxygen	Check cylinder volume, tubing length, mask/cannula and route.	Confirm flow, mask fit, saturation, breathing effort and cylinder security.
IV line	Trace from patient to bag/pump; ensure slack and clamp/pump safety.	Check site, flow, dressing, pain and that tubing is not kinked or pulled.
Urinary catheter	Keep the drainage bag below bladder level and secure tubing.	Check bag position, urine flow and absence of traction.
Chest drain	Keep the system upright and below chest level; follow service protocol.	Check connections, bubbling/air leak indications and dressing.
Monitoring leads	Bundle leads and protect them from snagging.	Confirm waveform, pulse oximeter signal and blood pressure cuff position.
Splint/dressing	Support the injured limb and protect bleeding control.	Recheck colour, warmth, pulse, sensation, movement and pain.

Bariatric patient movement

Plan early and respectfully. A bariatric patient may require a wider stretcher, reinforced wheelchair, larger slide sheet, additional staff, a suitable hoist and a route that can accommodate the equipment. Do not improvise with undersized equipment or ask one rescuer to lift. Protect dignity, communicate clearly and identify weight limits before movement.

Children and infants

Use age-appropriate equipment and a team member assigned to the airway/head.
Keep the child warm and with a caregiver when safe; explain the move in words the child understands.
Never carry an infant by one arm, wrist or clothing; support the head and trunk.
Secure children in approved transport systems, not on an adult's lap during ambulance movement.
Watch for sudden movement, airway obstruction and equipment that is too large or loose.

Pregnant patient movement

Explain the move, preserve privacy and ask about pain, bleeding, contractions, dizziness and fetal movement.
Use a left lateral tilt or lateral support when later pregnancy and prolonged supine positioning are concerns.
Maintain airway and breathing access; do not let pregnancy positioning delay resuscitation.
Use enough staff for the patient's centre of gravity and protect the abdomen during transfers.
Move immediately for haemorrhage, collapse, fire, violence or other danger, then reassess mother and fetus according to available protocol.

Patients with burns

Move a burned patient away from the heat source and stop the burning process when safe. Avoid dragging across burned skin unless remaining in place is more dangerous. Use a clean sheet or rescue blanket to reduce contamination and friction, support the airway, keep the patient warm and avoid breaking blisters unnecessarily.

Patients with amputations or unstable fractures

Control catastrophic bleeding before movement.
Support above and below an unstable fracture; do not straighten an obviously deformed limb.
Secure the amputated part separately according to local protocol and transport it with the patient.
Recheck distal pulses, colour, warmth, sensation and pain after every movement or splint.

Patients with altered behaviour or agitation

Use calm communication, reduce stimulation and seek help. Do not use a manual lift or physical restraint simply because a patient is difficult. Look for hypoxia, hypoglycaemia, pain, sepsis, head injury, intoxication or withdrawal. If movement is essential for safety, follow the service's trained team-restraint and monitoring protocol, preserving airway access and dignity.

Reassessment after movement

Every movement can change physiology. Repeat a focused ABCDE immediately after the patient reaches the new position:

Check	What to look for
Airway	Patency, voice, secretions, vomit, swelling, suction and airway adjunct position.
Breathing	Rate, effort, chest movement, colour, oxygen saturation, breath sounds and ability to speak.
Circulation	Bleeding, pulse, blood pressure, skin temperature/colour, capillary refill and pain.
Disability	AVPU/ACVPU or GCS, pupils, glucose when indicated, new weakness/numbness or seizure activity.
Exposure/equipment	Wounds, pressure areas, splints, dressings, lines, tubes, oxygen and monitoring connections.

Clinical scenarios

Scenario 1: Fire in a ward corridor

A patient is found supine near smoke. They are conscious but unable to stand and the smoke is getting thicker.

Reasoning: This is an emergency evacuation. Call for help, keep low if appropriate, use a blanket or approved drag, protect the head and move only to the nearest safe area. Once clear, begin ABCDE and request definitive transport.

Scenario 2: Stable patient, unsafe manual lift

A 110-kg patient needs to move from bed to stretcher. Two staff members are available and no slide sheet or hoist has been prepared.

Reasoning: This is not an emergency evacuation. Stop, obtain the correct equipment and additional staff, lock surfaces and plan the move. Do not attempt a two-person lift that risks a fall or back injury.

Scenario 3: Road-crash patient with possible spine injury

A patient has neck pain and tingling in the hands but is lying in the path of traffic.

Reasoning: Staying in traffic is more dangerous than a carefully coordinated emergency move. Control the head/neck, use enough rescuers, keep the body aligned and move to safety; then continue spinal precautions and ABCDE.

Scenario 4: Collapse during walking

A patient becomes pale and dizzy while walking to the bathroom and the knees buckle.

Reasoning: Do not pull the arms or try to hold the full body upright. Guide the patient to the floor using controlled support, protect the head, assess ABCDE, check glucose where indicated and investigate syncope.

Scenario 5: Tube dislodgement risk

A patient on oxygen and IV medication must be moved urgently. The oxygen tubing and IV line are short and tangled around the bedrail.

Reasoning: Assign one person to lines and oxygen, trace and secure them, prepare the destination and move on a leader's command. Afterward confirm flow, IV site, saturation and patient response.

Scenario 6: Active seizure

A patient is convulsing beside a bed. Staff want to carry the patient immediately to another room.

Reasoning: Clear hazards and protect the head; do not restrain or carry during active movements unless there is immediate danger. Time the seizure, then assess ABCDE and use a lateral recovery position when breathing normally.

Common mistakes in lifting and moving

Mistake	Why it is unsafe	Better practice
Moving before assessing	Airway, bleeding, spinal injury or equipment risks are missed.	Perform a rapid primary survey and plan the minimum necessary movement.
One rescuer lifting a dependent patient	Loss of control, falls and musculoskeletal injury.	Use equipment and enough trained staff.
Pulling under the armpits	Can injure nerves, shoulders and skin.	Use a gait belt, broad support or approved transfer device.
Twisting while carrying	Injures the rescuer and can rotate a patient's spine.	Turn by stepping; move the whole body together.
Dragging by the ankles in every emergency	Head, neck and skin are poorly protected.	Use a blanket or broad-support drag when available; ankle drag is last resort only.
Rolling without a leader	Head, spine, lines and pelvis move out of sequence.	Assign one leader and use a clear count.
Ignoring pain or resistance	May indicate fracture, neurological injury or unsafe technique.	Stop, reassess and change the plan.
Not reassessing after movement	New airway obstruction, bleeding, hypoxia or neurovascular compromise is missed.	Repeat ABCDE and check equipment immediately.

Documentation template

Element	Record
Reason	Routine transfer, urgent treatment, transport or immediate danger/evacuation.
Pre-move status	Airway, breathing, circulation, consciousness, pain, injuries, neurovascular status and baseline.
Method	Drag, carry, log-roll, slide sheet, scoop, hoist, stretcher, wheelchair or team lift.
Personnel/equipment	Number and role of staff, device used, oxygen/lines/tubes and spinal precautions.
Response	Pain, distress, dizziness, vital signs, bleeding, airway, skin and neurological changes.
Post-move plan	Position, monitoring, reassessment frequency, handover and further transport/treatment.

Example note: “14:25—patient with suspected right femur fracture moved from roadway to ambulance stretcher because of active traffic. C-ABCDE completed before move; catastrophic bleeding absent, airway patent, RR 24, pulse 118, ACVPU A. Six-person coordinated lift using scoop stretcher, head controlled by team leader. Post-move: airway patent, RR 26, pulse 122, distal right foot warm with palpable pulse, sensation unchanged, pain 8/10. Oxygen and monitoring maintained; receiving team informed.”

Practical skills checklist

Scene safety, PPE and reason for movement identified.
Primary survey completed and life threats addressed.
Patient cooperation, injury, size, route and equipment assessed.
Team leader and roles assigned; command words agreed.
Wheels locked, destination ready and lines/tubes secured.
Body mechanics used: close load, neutral spine, bend knees/hips, step to turn.
Head/neck/spine alignment protected when indicated.
Minimum necessary movement performed; emergency drags used only for immediate danger.
Airway, breathing, circulation, consciousness, pain, skin and neurovascular status reassessed.
Method, staff, equipment, times, findings and response documented.

Revision questions

Differentiate a routine transfer, urgent move and emergency evacuation.
Why can manual patient handling injure rescuers and patients?
List seven questions in a movement risk assessment.
Explain STOP–ASSESS–PREPARE–MOVE–CHECK.
Why should a patient never be lifted by the armpits?
Describe a safe sit-to-stand transfer.
What equipment can reduce risk during a horizontal transfer?
Describe the roles of a team leader, head rescuer, trunk rescuer and leg rescuer.
When is a blanket drag appropriate?
List the key precautions for a clothing drag.
Why is ankle dragging a last-resort method?
Which patients should not receive a two-person seat carry?
State the principles of moving a patient with suspected spinal injury.
What must be checked before and after moving a patient with oxygen and IV lines?
How should movement be adapted for a bariatric patient?
What precautions are required when moving a pregnant patient?
How do you protect a patient during an active seizure?
Write an objective post-movement documentation note.
Give five reasons to stop a planned move.
Explain why reassessment after movement is a clinical safety intervention.

Key takeaways

Move a patient only for a clear reason, using the minimum movement necessary.
Routine transfers require planning and equipment; emergency drags/carries are for immediate danger.
Use a leader, clear commands, adequate staff and safe body mechanics.
Protect the airway, head/neck/spine, bleeding control, lines and injured limbs during every move.
Never pull under the arms, twist while carrying or improvise a heavy lift.
Reassess ABCDE, pain, skin and neurovascular status immediately after movement.
Document the reason, method, people, equipment, response and handover.

References and further study

Clinical note: This lesson supports emergency medical care education. Practise lifting, dragging, carrying and spinal movement techniques under qualified supervision, within your scope of practice and according to current Uganda Ministry of Health, ambulance-service and receiving-facility protocols.

Moving Patients: Lifting and Dragging Techniques Read More »

Positions Used in Emergency Care

Why positioning matters: A patient's position can open or obstruct the airway, improve or worsen ventilation, support circulation, protect an injured spine, reduce aspiration, relieve pain and make procedures safer. Position is therefore an emergency intervention—not merely a comfort measure. Choose the position that best supports the patient's immediate physiology, mechanism of injury and procedure, then reassess after every change.

Learning outcomes

By the end of this lesson, the emergency medical care student should be able to:

Define patient positioning and explain its objectives in emergency care.
Choose safe positions for airway protection, breathing difficulty, shock, trauma, pregnancy, seizures and common procedures.
Place an unresponsive but normally breathing patient into a safe recovery position when appropriate.
Differentiate supine, recumbent, Fowler, semi-Fowler, sitting-up, prone, lateral and Sims positions.
Recognise when a position is contraindicated or must be modified because of trauma, spinal injury, pelvic injury, respiratory failure or pregnancy.
Move patients with team communication, spinal alignment, pressure-area protection and dignity.
Monitor airway, breathing, circulation, consciousness, pain and neurovascular status after positioning.
Document the position used, the reason, assistance required, patient response and reassessment findings.

What is emergency patient positioning?

Emergency patient positioning is the deliberate placement or repositioning of a patient to maintain life, reduce harm, facilitate examination or enable a procedure. The best position changes with the clinical problem. A position that helps one patient—for example, sitting upright for severe breathlessness—may be unsafe for another, such as a patient with shock or a suspected spinal injury.

The five questions before choosing a position

Airway: Can the patient protect and maintain an open airway in this position?
Breathing: Does the position improve chest expansion, reduce work of breathing and allow oxygen/ventilation?
Circulation: Could it worsen hypotension, bleeding, venous return or perfusion?
Injury: Could movement aggravate spinal, pelvic, head, chest, abdominal or limb injury?
Procedure and dignity: Does it permit safe care while preserving warmth, privacy and informed cooperation?

Universal positioning principles

Principle	Practical application
Assess first	Perform a rapid primary survey and identify immediate threats before moving a patient unless the scene itself is unsafe.
Position for physiology	Choose the position that supports airway, breathing and circulation—not a memorised position alone.
Move as a team	Assign one leader; communicate “ready, move, stop”; use enough staff and equipment for the patient's size and injury.
Protect alignment	Keep the head, neck and spine aligned when trauma or neurological symptoms are possible; avoid twisting.
Prevent falls	Lock wheels, lower the bed when appropriate, use side rails according to policy and never leave a weak patient unsupported.
Maintain dignity	Explain the change, screen the patient, expose only what is needed and use a sheet or blanket.
Reassess	Repeat airway, breathing, circulation, consciousness, pain, skin colour and neurovascular checks immediately after repositioning.
Document	Record the position, indication, time, assistance/equipment, tolerance and response.

Safety rule: If the patient becomes more breathless, pale, confused, painful, cyanosed, hypotensive or less responsive after a position change, return to the safest tolerated position and repeat ABCDE. A position is never “correct” if the patient's physiology worsens.

Quick position-selection guide

Clinical situation	Common starting position	Main caution
Unresponsive but breathing normally	Recovery/lateral position if no overriding injury prevents it.	Not for cardiac arrest or abnormal breathing; monitor continuously.
Severe breathlessness, conscious	High Fowler, supported sitting or tripod/orthopnoeic position.	Do not force flat; watch for fatigue or shock.
CPR or airway procedure	Supine on a firm surface.	If breathing is abnormal, do not delay resuscitation for recovery position.
Suspected spinal injury	Neutral alignment on a firm support with manual stabilisation and service-approved immobilisation.	Airway takes priority; avoid unnecessary rolling.
Pregnant patient with distress	Left lateral tilt or lateral position when appropriate; position of comfort for breathing.	Do not compromise airway, ventilation or urgent delivery care.
Shock without trauma	Supine if tolerated, with warmth and close monitoring.	Do not use routine leg elevation or head-down tilt without protocol and exclusions.
Vomiting/aspiration risk	Side-lying with airway visible, or upright if conscious and protecting the airway.	Use spinal precautions when trauma is possible.
Seizure	Protect from injury; after convulsions, lateral recovery position if breathing normally.	Do not restrain or put objects in the mouth.

Supine or dorsal recumbent position

Supine means lying flat on the back, usually with the head and neck in neutral alignment. It is the standard position for CPR, many examinations, spinal alignment, some transfers and procedures requiring access to the anterior body. “Dorsal recumbent” usually describes the patient on the back with knees flexed and feet supported, which can reduce abdominal muscle tension and assist selected examinations.

When supine is useful

Chest compressions and defibrillation on a firm surface.
Initial trauma assessment when spinal alignment is being maintained.
Bag-mask ventilation when the airway can be opened and the patient is supported.
Examination of the anterior chest, abdomen, pelvis and limbs.
Patients who are faint but breathing normally when no breathing difficulty or trauma prevents it.

Supine risks and modifications

Risk	Why it occurs	Modification
Airway obstruction	The tongue, vomit or secretions can obstruct a reduced-consciousness patient.	Open and monitor the airway; use a recovery position when appropriate.
Worsened breathlessness	Flat posture can reduce comfort and lung expansion in some patients.	Raise the head/chest or allow supported sitting if circulation and injury status permit.
Aspiration	Vomitus or secretions may pool in the mouth.	Turn laterally or sit upright if safe and monitor suction/airway.
Aortocaval compression	Late pregnancy can reduce venous return when completely supine.	Use left lateral tilt or another obstetric position according to protocol.
Pressure injury	Prolonged immobility loads the occiput, sacrum, heels and elbows.	Pad pressure areas, reassess skin and reposition when clinically safe.

Recumbent variations

Position	Description	Emergency use
Flat supine	Back flat, legs extended, head neutral or supported.	CPR, some trauma assessments and procedures on a firm surface.
Dorsal recumbent	Back supported, knees flexed and feet flat or supported.	Selected abdominal/pelvic examinations, comfort and reduced abdominal tension.
Low Fowler	Head/chest elevated slightly, commonly about 15–30 degrees.	Comfort, mild breathlessness or gradual elevation after lying flat.
Semi-Fowler	Head/chest elevated approximately 30–45 degrees.	Moderate breathlessness, feeding/aspiration precautions and many bedside procedures.
High Fowler	Head/chest elevated approximately 60–90 degrees.	Severe breathlessness, airway access and upright assessment when blood pressure allows.
Supported sitting	Patient sits at the edge of bed/chair or in a stretcher with back and arms supported.	Position of comfort for respiratory distress or some chest pain patients.

Sitting-up, Fowler and orthopnoeic positions

Upright positions allow the diaphragm to move more freely and can reduce the sensation of breathlessness. A conscious patient with respiratory distress should generally be allowed to choose the most comfortable upright posture unless shock, spinal injury, altered consciousness or a procedure requires another position. Support the arms on a table, pillows or the patient's knees when a tripod/orthopnoeic position helps them breathe.

When upright positioning helps

Asthma, chronic obstructive lung disease, pneumonia or pulmonary oedema with a conscious patient.
Upper-airway swelling when the patient is protecting the airway and remains cooperative.
Chest discomfort when sitting reduces distress and the patient is not hypotensive or faint.
Oral suction, nebuliser delivery and some airway procedures.
Patients who cannot tolerate lying flat because of orthopnoea.

Upright positioning cautions

Situation	Why caution is needed	Safer approach
Shock or near-syncope	Sitting may reduce cerebral perfusion and cause collapse.	Support safely, reassess circulation and use supine if tolerated and not contraindicated.
Suspected spinal injury	Movement can worsen instability or neurological injury.	Maintain alignment and follow spinal-motion restriction/transport protocol.
Reduced consciousness	The patient may slump and lose airway protection.	Maintain airway, use appropriate support or lateral recovery position when indicated.
Severe fatigue	A patient may appear better upright while tiring from respiratory failure.	Monitor speech, effort, response, respiratory rate and oxygenation continuously.
Pelvic/lower-limb injury	Standing or sitting may increase pain or bleeding.	Keep still and support the injured area; move with a coordinated team.

Recovery position: purpose and eligibility

The recovery position is a stable lateral position for a person who is unresponsive or has markedly reduced consciousness but is breathing normally and does not require immediate CPR. It helps maintain airway patency and allows fluids such as saliva, blood or vomit to drain from the mouth. It is not a replacement for airway assessment, suction, monitoring or urgent transport.

Remember: An unresponsive person who is not breathing normally, is gasping or has no signs of life needs the resuscitation pathway—not the recovery position. Airway and breathing take precedence over concerns about moving the patient.

Recovery position: step-by-step

Complete a rapid primary survey and call for help. Confirm that breathing is normal and identify obvious injuries or hazards.
Kneel beside the patient and straighten both legs if safe. Remove glasses and bulky objects that could injure the patient or obstruct the roll.
Place the arm nearest you at a right angle to the body, elbow bent and palm facing upward.
Bring the far arm across the chest; hold the back of that hand against the cheek nearest you.
With your other hand, grasp the far thigh and bend the far knee while keeping the foot on the ground.
Using the bent knee as a lever, gently roll the patient toward you while supporting the head and neck.
Adjust the upper leg so the hip and knee are flexed for stability; keep the face and mouth angled downward enough for drainage.
Open and inspect the airway, check breathing and circulation again, cover the patient and continue monitoring.

Recovery position: monitoring after the roll

Recheck normal breathing continuously at first and at regular intervals according to local protocol.
Keep the airway visible; suction secretions when trained and available.
Observe skin colour, chest movement, pulse, response, temperature and vomiting.
Keep the patient warm and do not leave them alone except to obtain essential help.
Turn to the opposite side at appropriate intervals if prolonged waiting is unavoidable and no injury prevents it.
If breathing becomes abnormal or stops, roll supine onto a firm surface and begin resuscitation.

Recovery-position precautions

Concern	How to manage it
Suspected spinal injury	Use a coordinated log-roll with spinal alignment if the airway requires lateral positioning; airway management remains the priority.
Pelvic or long-bone injury	Minimise movement and use enough trained staff/equipment; do not force the standard roll.
Pregnancy	Use a left lateral position or left lateral tilt when appropriate, while maintaining airway and breathing support.
Traumatic chest injury	Choose the position that supports ventilation; some patients breathe better on the injured side, but reassess continuously and follow trauma protocol.
Severe vomiting	Keep the mouth angled downward, suction and monitor; prepare for rapid airway deterioration.
Cardiac arrest/agonal breathing	Do not use recovery position; start the resuscitation sequence immediately.

Lateral and Sims positions

A lateral position places the patient on one side with the head, trunk and limbs supported. A Sims position is a semi-prone lateral position, often with the lower arm behind or positioned for a procedure. In emergency care, the exact name matters less than the clinical purpose: airway drainage, pressure relief, access to a body region or comfort. Never allow the chest or abdomen to be compressed in a way that impairs breathing.

Choosing the left or right side

Choice	Possible reason	Important caution
Left lateral	Often preferred in later pregnancy; may assist drainage and reduce aortocaval compression.	Do not delay resuscitation or compromise airway/ventilation.
Right lateral	May be chosen for comfort, access, injury avoidance or pressure-area rotation.	Ensure the airway remains visible and the patient is stable.
Injured side down	May sometimes improve ventilation in unilateral lung injury when the patient is conscious and monitored.	Not a universal rule; follow local trauma/respiratory advice and reassess.
Non-injured side down	May protect a wound or painful area.	Do not choose it if the airway, breathing or bleeding is worse in that position.

Positioning a patient with shock

For many shocked patients who are breathing adequately and have no injury that makes it unsafe, lying supine helps preserve cerebral perfusion and allows rapid assessment. Keep the patient warm, control bleeding, monitor continuously and treat the cause. Do not assume that raising the legs or using a head-down tilt is appropriate for every type of shock.

Leg elevation and Trendelenburg: use caution

Position/intervention	Why it may be considered	Why it can be unsafe
Supine, legs flat	Allows assessment, airway access and stable alignment for many shocked patients.	May worsen breathlessness or aspiration risk in some patients.
Passive leg elevation	May transiently increase venous return in selected non-trauma patients under a local protocol.	Can worsen pain, pelvic/leg injury, abdominal pressure, pulmonary oedema or bleeding.
Head-down Trendelenburg	Historically used for shock.	Can worsen ventilation, aspiration, intracranial pressure and pulmonary oedema; do not use routinely without protocol.
Position of comfort	Reduces distress in conscious patients with breathing difficulty or pain.	May not support circulation if the patient becomes faint or collapses; reassess constantly.

Positioning by shock type

Haemorrhagic shock: control bleeding, keep supine if tolerated, maintain warmth and avoid unnecessary limb or pelvic movement.
Septic shock: choose the position that supports airway and breathing; monitor temperature, perfusion and mental status.
Anaphylactic shock: follow the anaphylaxis protocol; a patient with breathing difficulty may sit, while a patient with circulatory collapse may need supine positioning with legs supported if tolerated. A pregnant patient is usually positioned laterally.
Cardiogenic shock/pulmonary oedema: sitting upright may reduce breathlessness, but watch blood pressure and consciousness.
Obstructive shock: position for breathing and rapid definitive treatment; do not delay transport for positioning experiments.

Prone position

Prone means lying on the abdomen. It may be used for selected procedures, pressure relief or, in specialist settings, carefully monitored respiratory support. It is generally unsuitable for an unmonitored unconscious patient because the airway and chest are difficult to observe. Avoid turning a trauma patient prone unless a clear indication, adequate staff and a coordinated plan exist.

Prone-position risks

Risk	Prevention/response
Airway inaccessible	Use only with a protected airway or trained team; keep the face visible and monitor continuously.
Restricted chest/abdomen	Support the thorax and pelvis as appropriate; ensure ventilation is not impaired.
Spinal twisting	Use a coordinated log-roll and maintain alignment when trauma is possible.
Pressure injury	Pad face, eyes, chest, pelvis, knees and toes; reassess skin and pressure points.
Lines/tubes dislodged	Secure equipment, assign a person to protect lines and check them after every move.

Trauma positioning and spinal alignment

When a significant mechanism, neck/back pain, neurological deficit, altered consciousness or distracting injury suggests spinal risk, minimise unnecessary movement. Maintain manual in-line stabilisation, keep the head and trunk aligned and use approved equipment and techniques. The airway remains the priority: if the airway cannot be maintained in the original position, move the patient as safely and quickly as necessary.

Neutral alignment

Keep the nose aligned with the sternum and avoid flexion, extension or rotation.
Use rolled towels or approved supports only when they do not force the head into an abnormal position.
Do not remove a helmet unless the airway or ventilation requires it and trained staff are available.
Check sensation, movement, pulses and pain before and after movement when feasible.
Use a scoop stretcher, vacuum mattress or other approved device according to local service policy; equipment does not replace monitoring.

Log-roll position and technique

Explain the plan, assign a leader and decide where the patient will be rolled.
Prepare the destination surface, sheets, suction, oxygen and monitoring before moving.
Position the team on the same side and opposite side; the leader controls the head and gives commands.
Align the arms and legs, support the injured limb and secure lines/tubes.
On the leader's command, roll the head, shoulders, trunk and pelvis together as one unit.
Inspect the back, place the device or sheet, then return the patient as one unit.
Reassess airway, breathing, circulation, consciousness, pain and neurovascular status immediately.

Positions for common emergency presentations

Presentation	Useful position	Clinical reasoning
Asthma/COPD	Upright, supported sitting or tripod.	May improve chest expansion and reduce work of breathing.
Pulmonary oedema	High Fowler or sitting with legs supported.	May reduce breathlessness; monitor for hypotension and fatigue.
Unconscious, breathing	Recovery/lateral position when no overriding injury.	Maintains a visible, draining airway.
Seizure during convulsion	Protect in place; remove hazards and cushion the head.	Do not restrain or force a side position during active movements.
Post-seizure	Lateral recovery position if breathing normally.	Reduces aspiration risk while consciousness returns.
Syncope/fainting	Supine with airway open; legs supported only if safe and per protocol.	Supports cerebral perfusion while cause is assessed.
Anaphylaxis	Position according to dominant problem: upright for breathing, supine for collapse, lateral in pregnancy.	Prevents sudden deterioration from an inappropriate posture.
Stroke	Head elevated or lateral if drowsy/vomiting; position of comfort if alert.	Protects airway and supports assessment while urgent transfer is arranged.
Head injury	Neutral alignment; elevate head only if protocol/clinician directs and perfusion is maintained.	Prevents movement while balancing airway, ventilation and perfusion.
Abdominal injury	Supine with knees flexed if tolerated; position of comfort.	May reduce abdominal muscle tension; avoid pressure on an evisceration.
Pelvic injury	Supine, legs aligned and supported; minimise movement.	Reduces pelvic motion and possible haemorrhage.
Burns	Position to protect the airway, injured surfaces and joints; keep warm.	Prevents further tissue damage and supports ventilation.

Positioning for airway and breathing procedures

Procedure	Usual position	Safety points
Bag-mask ventilation	Supine on a firm surface, with the airway opened and head position appropriate to trauma status.	Use a two-person seal when possible; monitor chest rise and avoid gastric inflation.
Oropharyngeal airway insertion	Supine with head supported, or a trained alternative when spinal precautions apply.	Use only in an unresponsive patient without a gag reflex; choose correct size.
Suction	Side-lying or upright when possible; supine if required for resuscitation.	Keep the airway visible, suction briefly and reassess oxygenation.
Nebuliser treatment	Upright or semi-Fowler, with the patient supported.	Monitor effort, fatigue, pulse, response and oxygenation; do not leave a deteriorating patient unattended.
Chest compressions	Supine on a firm surface, rescuer shoulders above the chest.	Do not delay CPR to create a perfect bed position; move safely to a firm surface.
Oxygen delivery	Position of comfort that keeps the mask/cannula in place.	Ensure the patient can breathe through the device and reassess response.

Positioning for procedures and examinations

IV access/monitoring: choose a stable position that exposes the limb without allowing a fainting patient to fall.
Oral or facial examination: sit upright or semi-Fowler when the airway is protected; use suction for secretions.
Abdominal examination: supine or dorsal recumbent with knees flexed if tolerated.
Rectal/perineal care: lateral or Sims with privacy and a chaperone according to policy.
Urinary catheter or pelvic care: dorsal recumbent only when clinically safe and consented; protect dignity.
Spinal examination: neutral alignment; avoid asking the patient to sit, stand or walk when spinal injury is possible.

Pregnancy-specific positioning

Pregnancy changes the relationship between the uterus, diaphragm and large blood vessels. In later pregnancy, prolonged flat supine positioning can reduce venous return in some patients. Use a left lateral tilt or lateral position when appropriate, but do not allow positioning advice to delay airway management, resuscitation, urgent delivery care or transport.

Situation	Positioning approach	Monitor
Pregnant and conscious with breathlessness	Position of comfort, often upright or semi-Fowler; consider left tilt if lying.	Airway, breathing effort, oxygenation, blood pressure and fetal/maternal symptoms.
Pregnant with shock/collapse	Left lateral tilt or manual uterine displacement while maintaining resuscitation access.	Response, pulse, blood pressure, bleeding and need for urgent obstetric help.
Pregnant and unresponsive but breathing	Left lateral recovery position if safe, with airway visible.	Normal breathing, airway drainage, trauma and fetal/maternal deterioration.
Pregnant patient requiring CPR	Firm supine surface with manual left uterine displacement or appropriate tilt per resuscitation protocol.	High-quality compressions, airway, rhythm and rapid advanced support.

Children and infants

Allow a conscious child with breathing difficulty to remain in the position of comfort, usually upright with a caregiver nearby.
Do not force an infant with airway compromise flat if upright positioning supports breathing while help is summoned.
For an unresponsive breathing child, use a child-appropriate recovery position and support the head without flexing the neck.
For a baby, avoid placing the face into soft bedding; maintain a clear visible airway and continuous supervision.
Use age-appropriate equipment, padding and team size; a child's body can roll unexpectedly during movement.

Positioning for seizures

During an active seizure, protect the patient from injury rather than forcing a position. Move dangerous objects away, cushion the head, loosen tight clothing and time the event. Do not restrain the limbs and do not put a spoon, finger or other object in the mouth. After the convulsion stops, assess breathing and consciousness; if breathing normally and no injury prevents it, use a lateral recovery position and monitor closely.

Stroke and altered consciousness

An alert patient with suspected stroke may remain in a comfortable position with the head supported while glucose, response and stroke timing are assessed.
A drowsy or vomiting patient needs an airway-protective lateral position when safe, with spinal precautions if trauma is possible.
Do not give food, drink or oral medicines to a patient with impaired swallowing or reduced consciousness.
Record the last-known-well time and reassess the face, arms, speech, airway and consciousness after every move.

Moving a patient to a new position

Explain the reason and obtain consent when the patient is able to understand.
Perform a quick ABCDE and identify lines, tubes, fractures, wounds, drains, monitoring leads and pressure points.
Decide whether the move is necessary now or whether the patient can be assessed in the current position.
Choose the equipment and staff; assign a leader to control the head/neck when spinal alignment is relevant.
Lock bed/stretcher wheels, clear obstacles and prepare the destination.
Give a clear command: “Ready—move on three—one, two, three.”
Move smoothly without dragging the skin; avoid twisting, sudden flexion or unsupported limbs.
Secure the patient, replace covers and reconnect oxygen, monitoring and lines.
Repeat airway, breathing, circulation, response, pain and neurovascular checks.
Document the position, reason, assistance, tolerance and findings after the move.

Beds, stretchers and transport positions

Transport concern	Positioning action
Breathing difficulty	Keep upright or semi-Fowler if safe; secure oxygen and ensure suction is available.
Unconscious patient	Use lateral recovery or approved airway-protective transport position when not in arrest; never leave unobserved.
Spinal injury	Use approved immobilisation/transport system with alignment and padding; reassess distal circulation and sensation.
Shock	Keep warm, usually supine if tolerated, and position for airway access and rapid intervention.
Vomiting/aspiration risk	Keep suction ready, position laterally or upright as appropriate and monitor continuously.
Paediatric patient	Use a correctly sized restraint system and keep the caregiver informed without compromising safety.

Pressure-area and skin protection

Inspect occiput, ears, shoulders, elbows, sacrum, hips, knees, ankles and heels during prolonged care.
Use pillows, foam or approved padding to offload bony prominences without blocking the airway.
Keep skin dry and remove wet clothing or wrinkled sheets.
Reposition when clinically safe, especially after long transport or waiting periods.
Document pre-existing wounds so they are not mistaken for injuries caused during care.

Positioning mistakes to avoid

Mistake	Why it is unsafe	Better practice
Putting every unconscious patient supine	The tongue, vomit or secretions may obstruct the airway.	Assess breathing and use a recovery position when appropriate; resuscitate if breathing is abnormal.
Using the recovery position in cardiac arrest	It delays chest compressions and ventilation.	Follow the resuscitation pathway for absent/abnormal breathing.
Forcing a breathless patient flat	It may worsen ventilation, distress and fatigue.	Allow supported upright positioning unless contraindicated.
Using Trendelenburg routinely for shock	It may impair breathing, increase aspiration risk and worsen some conditions.	Use supine/position of comfort and follow current local protocol.
Rolling a trauma patient alone	Spinal twisting, falls and line dislodgement may occur.	Use a leader, adequate staff and coordinated movement.
Ignoring the patient's baseline physiology	A position may appear textbook but worsen the individual patient.	Watch the patient, not only the diagram; reassess after every change.
Leaving an exposed patient cold	Hypothermia worsens pain, shock and clotting problems.	Expose one area at a time and cover promptly.
Failing to secure equipment	Oxygen, lines, drains or monitoring may be pulled out.	Assign a team member to protect equipment during movement.

Clinical scenarios

Scenario 1: Unresponsive but breathing

A man is found unconscious after drinking. He is breathing regularly, has no obvious major injury and vomit is collecting around his mouth.

Reasoning: Call for help, perform a primary survey and place him in a safe lateral recovery position if no injury prevents movement. Keep the airway visible, suction when trained and reassess continuously. If breathing becomes abnormal, start resuscitation.

Scenario 2: Severe breathlessness

A woman with asthma is sitting forward, using accessory muscles and unable to lie flat. Her blood pressure is adequate and she is alert.

Reasoning: Allow supported sitting/tripod posture, provide prescribed emergency treatment within protocol and monitor for fatigue. Do not force supine positioning just to complete an examination.

Scenario 3: Road-crash patient with neck pain

A patient after a collision is lying on the road, awake but reporting neck pain and tingling in the hands. The airway is currently open.

Reasoning: Maintain manual in-line stabilisation, minimise movement, call for trained assistance and use approved spinal-motion restriction. If the airway becomes threatened, airway management takes priority over keeping the original position.

Scenario 4: Pregnant patient with collapse

A woman in late pregnancy is pale and dizzy after vaginal bleeding. She becomes faint while lying flat.

Reasoning: Call obstetric/advanced help, maintain airway and breathing, use a left lateral tilt or manual uterine displacement according to protocol, control visible bleeding and reassess circulation continuously.

Scenario 5: Seizure in a crowded room

A patient has tonic-clonic movements near a table. Family members try to hold the arms and put a spoon into the mouth.

Reasoning: Clear hazards, cushion the head, protect privacy and time the seizure. Do not restrain or place objects in the mouth. After the seizure, assess ABCDE and use lateral recovery if breathing normally.

Scenario 6: Shock and pulmonary oedema

An older patient is pale, sweaty, breathless and hypotensive with crackles. A colleague suggests elevating both legs and lying the patient flat.

Reasoning: The position must balance circulation and breathing. Sit the patient upright if tolerated, request urgent advanced support, monitor closely and follow the local shock/pulmonary-oedema protocol rather than applying a routine leg-elevation rule.

Positioning documentation example

Example: “At 11:42, conscious patient with severe wheeze placed in high Fowler/tripod position with arms supported. Patient reported easier breathing; speech improved from two-word phrases to short sentences. RR decreased from 34 to 28/min, SpO₂ increased from 88% to 93% with prescribed oxygen. Airway patent, BP unchanged. Continuous reassessment ongoing.”

Positioning checklist for practical assessment

Primary survey completed and immediate threats addressed.
Reason for the chosen position clearly stated.
Airway, breathing, circulation and spinal/injury risks considered.
Patient or caregiver informed where possible.
Team leader, staff and equipment prepared for movement.
Wheels locked, lines/tubes protected and falls prevented.
Privacy, warmth and pressure areas protected.
Airway visible and breathing monitored after the move.
Consciousness, pain, skin colour, pulse and neurovascular status reassessed.
Position, indication, time, response and handover documented.

Revision questions

Define emergency patient positioning.
List the five questions an EMT should ask before choosing a position.
When is a supine position useful in emergency care?
Give four risks of leaving a reduced-consciousness patient flat on the back.
Differentiate flat supine, dorsal recumbent, semi-Fowler and high Fowler.
When should a breathless patient be allowed to sit upright?
What are the eligibility criteria for a recovery position?
Describe the steps of placing an adult in a recovery position.
What must be monitored after a patient is placed laterally?
Why is the recovery position inappropriate for abnormal breathing or cardiac arrest?
When might a left lateral position be preferred in pregnancy?
Why should Trendelenburg not be used routinely for shock?
What is the correct response during an active seizure?
List six findings that should make you suspect spinal injury.
Describe the principles of a coordinated log-roll.
How should a patient with a pelvic injury generally be positioned?
What positioning changes may help a patient with pulmonary oedema?
What are the main pressure areas to protect during prolonged positioning?
Write an objective documentation note after positioning a breathless patient.
Give four reasons to stop a position change and return to ABCDE.

Key takeaways

Positioning is an active emergency intervention that must support airway, breathing, circulation and injury safety.
Use the recovery position for an unresponsive patient who is breathing normally when no overriding injury prevents it.
Use upright or tripod positioning for many conscious patients with breathing difficulty, but monitor for fatigue and shock.
Supine is essential for CPR and many trauma procedures, but it is not automatically safe for every patient.
Pregnancy, spinal injury, pelvic injury, burns, seizures and reduced consciousness require specific modifications.
Do not use routine Trendelenburg or leg elevation as a substitute for treating the cause of shock.
Move patients with a leader, adequate help, alignment, equipment protection, warmth and repeated reassessment.

References and further study

Clinical note: This lesson supports emergency medical care education. Perform patient movement and procedures only within your training and scope of practice, and follow current Uganda Ministry of Health, ambulance-service and receiving-facility protocols.

Positions Used in Emergency Care Read More »

ABCDE Approach to Emergency Examination and Secondary Survey

ABCDE Approach to Emergency Examination & Secondary Survey

Why this matters: The ABCDE approach gives the EMT a repeatable method for finding and treating immediate threats to life. It is not a one-time checklist and it is not a substitute for clinical judgement. Assess the patient in order, treat a life-threatening problem as soon as it is found, call for help early, measure the response, and return to the beginning when the patient's condition changes. Once the primary survey is completed and immediate threats are controlled, the secondary survey searches systematically for injuries and illness that could otherwise be missed.

Learning outcomes

After studying this lesson, the emergency medical care student should be able to:

Explain the purpose, sequence and limitations of the ABCDE approach.
Recognise when a trauma patient requires a C-ABCDE sequence because catastrophic external haemorrhage is present.
Assess and manage immediate threats to the airway while protecting the cervical spine when indicated.
Identify respiratory distress, respiratory failure and life-threatening chest conditions during the breathing assessment.
Assess circulation, control external haemorrhage, recognise shock and obtain appropriate monitoring.
Assess disability using response, pupils, glucose, seizures and neurological trends.
Expose enough of the patient to find hidden injury while preventing hypothermia and preserving dignity.
Perform a methodical secondary head-to-toe survey and focused history when the patient is stable enough.
Reassess, document, communicate and hand over findings in a way that another clinician can act on.

What the ABCDE approach is—and what it is not

ABCDE stands for Airway, Breathing, Circulation, Disability and Exposure. It is an initial assessment and treatment framework for an acutely ill or injured person. The order reflects the fact that an obstructed airway, absent breathing or catastrophic circulatory failure can kill within minutes. The framework is used for adults, children and pregnant patients, with age-appropriate equipment and modifications.

ABCDE is not a race to collect every vital sign before helping the patient. It is also not a diagnosis. It identifies physiological threats and buys time for a complete history, examination, investigations and definitive treatment.

Core principles of ABCDE

Principle	What it means in practice
Assess in sequence	Move from A to E, but stop and treat immediately when a life-threatening abnormality is found.
Treat as you find	Open/maintain the airway, support breathing, control haemorrhage and correct reversible threats before completing later steps.
Call for help early	Use the team, summon advanced support and prepare transport before the patient deteriorates further.
Reassess repeatedly	Repeat the primary survey after each intervention, whenever the patient worsens and during transfer.
Use objective data	Combine appearance, examination, respiratory rate, pulse, blood pressure, SpO₂, temperature, glucose and consciousness.
Look for causes	Correct immediate threats while considering trauma, illness, poisoning, pregnancy, infection and environmental causes.
Communicate	Give a clear time-stamped handover; use closed-loop communication when working with a team.

Preparation before touching the patient

Protect yourself and the team: use gloves, eye protection, mask/apron as indicated, and avoid exposure to blood, vomit, chemicals or violence.
Make the scene safe: look for traffic, electricity, fire, weapons, collapsed structures, gas, body fluids and ongoing violence.
Estimate the number of patients: request additional resources early during mass-casualty events.
Identify the mechanism or complaint: ask bystanders what happened while approaching, without delaying the first look.
Introduce yourself and obtain cooperation: explain what you will do and ask the patient to stay still when spinal injury or major trauma is possible.
Bring the right equipment: suction, oxygen, bag-mask device, airway adjuncts, monitoring, glucose meter, bleeding-control supplies, splints, blankets and communication tools.

First-look question: Does the patient look critically ill, injured or unable to protect the airway? If yes, shout for help and begin the primary survey immediately. Do not allow a long history, paperwork or a crowded scene to delay life-saving care.

C-ABCDE: catastrophic haemorrhage before airway

When major external bleeding is obvious or suspected, some trauma systems use C-ABCDE: first identify and control catastrophic haemorrhage, then continue with Airway, Breathing, Circulation, Disability and Exposure. This does not mean ignoring the airway; it recognises that a rapidly exsanguinating patient can die before an airway problem is reached.

Visible problem	Immediate action within training and protocol	Reassessment
Heavy limb bleeding	Apply firm direct pressure; use a tourniquet for life-threatening extremity bleeding if trained and local protocol permits.	Check whether bleeding has stopped, distal circulation where appropriate and time of application.
Junctional wound or groin/axilla bleeding	Pack and compress the wound when trained; maintain pressure and call for advanced help.	Look for continued blood loss and signs of shock.
Scalp or body wound	Direct pressure unless an impaled object or skull injury makes pressure unsafe; protect the wound.	Monitor dressings, mental status, perfusion and blood loss.
Amputation	Control bleeding, preserve the amputated part in clean moist covering inside a sealed bag placed cool—not directly on ice.	Repeat ABCDE; document time and mechanism.

A — Airway

The airway assessment asks whether air can move freely from the mouth and nose to the lungs, and whether the patient can protect that passage. Airway compromise can be caused by the tongue, vomit, blood, secretions, a foreign body, facial trauma, swelling, burns, infection, reduced consciousness or a cervical spine injury.

Airway: visual and auditory clues

Finding	What it may indicate	Priority
Unable to speak, silent chest or no air movement	Complete obstruction or respiratory arrest.	Call for help and begin the appropriate airway/resuscitation algorithm immediately.
Snoring	Tongue or soft-tissue obstruction in reduced consciousness.	Open the airway and consider an appropriate adjunct within scope.
Gurgling or bubbling	Blood, vomit or secretions in the airway.	Position/suction as trained; protect against aspiration.
Stridor or harsh inspiratory noise	Upper-airway narrowing, swelling or foreign body.	Keep the patient calm and upright if appropriate; request urgent advanced airway support.
Hoarse or muffled voice, drooling	Airway oedema, anaphylaxis, burns or deep neck infection.	Anticipate rapid deterioration; do not delay escalation.
Gasping, abnormal snoring or irregular breaths	Agonal breathing in an unresponsive patient.	Treat as ineffective breathing and follow the resuscitation protocol.

Airway assessment steps

Look into the mouth only as much as is safe: identify vomit, blood, secretions, loose teeth, dentures or an obvious foreign body.
Speak to the patient. A clear answer demonstrates that the airway is currently patent, but does not guarantee it will remain so.
Listen for snoring, gurgling, stridor, hoarseness or silence.
Look for facial swelling, burns, trauma, trismus, tongue swelling and increasing work of breathing.
If trauma is possible, manually stabilise the head and neck and use a jaw-thrust approach when trained; avoid unnecessary neck movement.
Remove only visible, easily accessible material; never perform a blind finger sweep.
Use suction and airway adjuncts according to training, age, gag reflex and local protocol.

Airway adjuncts: principles for EMT students

Adjunct/technique	Key principle	Important caution
Head-tilt/chin-lift	Opens the airway when trauma is not suspected.	Avoid or modify when cervical spine injury is possible.
Jaw thrust	Moves the mandible forward while limiting neck movement.	Can be difficult and painful; maintain spinal precautions when indicated.
Oropharyngeal airway	Helps prevent the tongue from obstructing the airway in an unconscious patient without a gag reflex.	Do not use in an awake patient with an intact gag reflex; choose the correct size.
Nasopharyngeal airway	May help a partially conscious patient who cannot tolerate an oral airway.	Avoid with major facial trauma or suspected basal skull injury and follow local policy.
Suction	Removes blood, vomit or secretions that obstruct ventilation.	Use brief, controlled suction; monitor oxygenation and avoid unnecessary trauma.
Bag-mask ventilation	Provides assisted ventilation when breathing is absent or inadequate.	Requires a good mask seal, airway opening and team coordination.

Airway memory cue: “LOOK, LISTEN, SPEAK, OPEN, SUCTION, SUPPORT.”
Look for obstruction and swelling; listen for abnormal sounds; speak to test patency; open with the correct manoeuvre; suction visible fluids; support with adjuncts/ventilation and advanced help.

B — Breathing

Breathing assessment determines whether the patient is ventilating and oxygenating adequately. Start with the look-listen-feel approach, then measure respiratory rate, oxygen saturation and other observations. A patient may have a normal-looking airway but still be in respiratory failure.

Breathing: look, listen and feel

Action	What to assess	Concerning finding
Look	Rate, rhythm, depth, chest movement, effort, colour, posture and ability to speak.	Very fast/slow breathing, pauses, shallow breaths, asymmetry, cyanosis, exhaustion or inability to speak.
Listen	Breath sounds and upper-airway noise without delaying treatment.	Wheeze, crackles, stridor, gurgling, silence, grunting or markedly reduced air entry.
Feel	Chest expansion, air movement, tracheal position and tenderness when appropriate.	Absent/asymmetric expansion, surgical emphysema, severe tenderness or tracheal deviation.
Measure	Respiratory rate, SpO₂, pulse, temperature and response to oxygen/positioning.	Falling saturation, increasing effort, altered response or worsening trend.

Respiratory rate and pattern

Count for a full minute when rhythm is irregular, and observe without announcing that you are counting because patients may unconsciously change their breathing.
Record rate, rhythm, depth and effort—not only the number.
Rapid shallow breathing may represent pain, fever, metabolic acidosis, shock or lung disease.
Slow, irregular or shallow breathing may reflect opioid toxicity, head injury, exhaustion or severe neurological disease.
Periodic breathing, apnoeic pauses or gasping are abnormal and require immediate escalation.

Work of breathing and fatigue

Look for nasal flaring, intercostal or suprasternal recession, accessory-muscle use, abdominal paradox, pursed lips, tripod posture and head bobbing in infants. Watch whether the patient can speak a full sentence. A patient who becomes quieter, drowsier or less effortful after severe respiratory distress may be tiring and losing the ability to ventilate.

Danger pattern: increasing effort + altered mental status + falling oxygen saturation is respiratory failure until proven otherwise. Reassess the airway, summon advanced help and support ventilation according to local protocol.

Oxygen saturation: useful but not sufficient

Apply the correct probe and check a good signal; cold fingers, movement, nail products and poor perfusion can reduce reliability.
Interpret SpO₂ alongside respiratory effort, mental status, skin colour and the patient's baseline.
A reassuring number does not exclude carbon monoxide exposure, hypoventilation or a deteriorating patient.
Follow local oxygen targets and protocol; do not delay airway or ventilation support while waiting for a reading.

Life-threatening breathing problems to recognise

Pattern	Appearance and examination clues	EMT priority
Severe asthma/bronchospasm	Wheeze, prolonged expiration, accessory muscles, inability to speak, exhaustion or a silent chest.	Position for comfort, oxygen/bronchodilator support within protocol and urgent escalation.
Pulmonary oedema	Breathlessness, orthopnoea, crackles, frothy sputum, sweating and anxiety.	Sit upright if tolerated, support oxygenation and seek urgent advanced care.
Tension pneumothorax	Sudden severe distress, unilateral absent breath sounds, hypotension, distended neck veins or tracheal deviation late.	Immediate advanced trauma/airway response; do not delay transport for a complete routine examination.
Massive haemothorax	Trauma, severe breathlessness, dull/absent breath sounds, pallor and shock signs.	Support breathing and circulation, control bleeding and expedite definitive care.
Airway obstruction	Stridor, inability to speak or cough effectively, cyanosis, silent chest or collapse.	Use the appropriate choking/airway algorithm immediately.

C — Circulation

Circulation assessment asks whether blood is moving effectively to the brain and organs. Examine pulses, skin, capillary refill, blood pressure, bleeding, urine history and mental status. Remember that shock can exist with a normal blood pressure during early compensation.

Circulation assessment sequence

Identify and control external haemorrhage.
Check central and peripheral pulse for rate, rhythm, strength and equality where clinically appropriate.
Inspect colour, temperature, moisture, mottling and capillary refill, considering skin tone and ambient temperature.
Measure blood pressure using the correct cuff; interpret a trend rather than one isolated number.
Look for signs of poor perfusion: confusion, restlessness, pallor/grey colour, cold clammy skin, weakness, faintness and reduced urine output history.
Consider cardiac monitoring, oxygen saturation, glucose and vascular access according to scope and protocol.

External haemorrhage control

Step	Action	Safety/documentation point
1. Expose enough	Find the source without unnecessary exposure; use gloves and eye protection.	Record location, approximate severity and mechanism.
2. Direct pressure	Apply firm continuous pressure with gauze or a clean dressing.	Do not keep lifting the dressing to look; add material over it if soaked.
3. Pack when indicated	Pack deep wounds such as groin, axilla or junctional areas when trained.	Maintain pressure and note the time.
4. Tourniquet when indicated	Use for life-threatening extremity bleeding when direct pressure is ineffective or impractical and protocol allows.	Record exact application time; do not loosen intermittently.
5. Reassess	Check bleeding control, distal findings where relevant, mental status and shock signs.	Handover the intervention and trend to the receiving team.

Pulse, perfusion and capillary refill

Assess the radial pulse in a conscious stable adult, but use a central pulse when the patient is collapsed or the peripheral pulse is absent.
Record fast/slow, regular/irregular, weak/bounding and equal/unequal—not merely “pulse present.”
Capillary refill is affected by temperature, age, lighting, pressure and skin tone; use it as one part of perfusion assessment, not a stand-alone diagnosis.
In dark skin, inspect conjunctivae, lips, tongue, palms, soles and nail beds and use the whole clinical picture.

Shock patterns

Shock pattern	Possible causes	Appearance clues
Hypovolaemic	Trauma, gastrointestinal loss, dehydration, burns or obstetric bleeding.	Pale, cool, sweaty, thirsty, restless, weak pulse and later reduced response.
Distributive/septic	Severe infection and systemic vasodilation.	Fever or low temperature, warm flushed skin early or cool mottled skin late, confusion and weakness.
Anaphylactic	Severe allergic reaction.	Hives, facial/tongue swelling, wheeze/stridor, flushing, hypotension or collapse.
Cardiogenic	Acute myocardial dysfunction or severe arrhythmia.	Breathlessness, chest discomfort, sweating, pallor, crackles, weak pulse and altered response.
Obstructive	Tension pneumothorax, tamponade or massive pulmonary embolism.	Severe breathlessness, distended neck veins, hypotension, unequal breath sounds or sudden collapse.

D — Disability

Disability is the rapid neurological assessment. It does not mean disability as a personal identity; it means detecting impaired brain function, seizures, hypoglycaemia and other reversible threats. A change in responsiveness can be caused by hypoxia, shock, glucose abnormality, stroke, head injury, infection, poisoning or postictal state.

Disability assessment components

Component	What to assess	Important question
Response	AVPU/ACVPU, GCS if trained, orientation, speech and ability to follow commands.	Is this new, and what is the patient's baseline?
Pupils	Size, equality, reaction to light and obvious abnormality.	Is there a new unequal or non-reactive pupil after trauma or neurological change?
Glucose	Point-of-care blood glucose when altered, confused, fitting, weak or diabetic.	Could a rapidly reversible glucose problem explain the presentation?
Seizure	Active convulsions, eye deviation, tonic-clonic movement, postictal drowsiness or injuries.	When did it start, how long, and did the patient return to baseline?
Focal deficit	Facial droop, arm/leg weakness, abnormal speech, gaze deviation or unequal coordination.	When was the patient last known well?
Temperature/medicines	Fever, hypothermia, sedatives, opioids, insulin, alcohol or toxins.	Could infection, exposure or medication cause the altered state?

Consciousness: trend is more important than one score

Record the patient's best response and repeat it. A drop from alert to voice, or from voice to pain, is significant even if the patient later improves. Use the same tool and stimulus each time. A GCS score may be required by local protocol, but a score must never delay airway and breathing support.

Finding	Immediate considerations
New confusion or agitation	Hypoxia, hypoglycaemia, shock, sepsis, stroke, head injury, intoxication or withdrawal.
Increasing drowsiness	Respiratory failure, opioid/sedative effect, intracranial injury, seizure or severe metabolic illness.
Unresponsive with normal breathing	Protect airway, place safely according to trauma risk, monitor continuously and seek advanced help.
Unresponsive with abnormal breathing	Immediate resuscitation response; treat gasping as ineffective breathing.

Glucose and altered mental status

Check glucose early in an unexplained altered mental state, seizure, weakness, collapse or diabetic patient.
Confirm the meter, strip, sample and units; record the value and time.
Follow local treatment protocol and reassess response after treatment.
Never give oral food or drink to a patient who cannot protect the airway.
Consider other causes even when glucose is abnormal; one finding does not exclude head injury, infection or poisoning.

E — Exposure and environment

Exposure means looking for hidden injury, rashes, bleeding, burns, swelling, medical devices and environmental clues while preventing heat loss. Uncover only what is necessary, maintain privacy and replace wet or soiled clothing with dry coverings. Hypothermia worsens coagulopathy and shock, particularly after major trauma.

Exposure sequence

Cut or remove clothing carefully when needed, taking account of mechanism, dignity, cultural preference and possible spinal injury.
Inspect front, sides and back for bleeding, wounds, burns, deformity, swelling, bruising, rash, needle marks and medical alert information.
Palpate only when appropriate and trained; look for tenderness, instability, crepitus, pulses and sensation.
Check temperature and protect from rain, wind, cold floors and wet clothing.
Cover the patient, preserve evidence when assault or crime is suspected, and document what was exposed and why.

Exposure findings that change urgency

Finding	Potential threat	Next priority
Hidden bleeding under clothing	Major haemorrhage.	Expose, control bleeding, prevent heat loss and repeat circulation assessment.
Burns to face, chest or circumferential limb	Airway inhalation injury, restricted ventilation or impaired perfusion.	Assess airway/breathing early and request advanced care.
Deformity, open fracture or absent distal pulse	Fracture, vascular injury or compartment threat.	Control bleeding, immobilise according to protocol and reassess neurovascular status.
Non-blanching rash with fever/toxicity	Serious infection or sepsis.	Escalate immediately and use infection precautions.
Wet/cold patient with altered response	Hypothermia, exposure or drowning.	Remove from hazard, dry/insulate, reassess ABCDE and prevent further heat loss.

Treat-before-diagnosis examples

Finding during ABCDE	Do not wait for	Act now
Airway obstruction with stridor	A complete history or definitive diagnosis.	Position, airway support, oxygen/ventilation as trained and urgent advanced help.
Severe respiratory distress	A chest X-ray or full secondary survey.	Support breathing, monitor and prepare rapid transfer.
Uncontrolled external bleeding	Blood pressure to “prove” shock.	Direct pressure/packing/tourniquet as indicated.
Altered patient with low glucose	A full neurological diagnosis.	Follow glucose treatment protocol and reassess consciousness.
Facial swelling and wheeze	Laboratory allergy testing.	Follow anaphylaxis protocol and anticipate airway deterioration.

Reassessment after ABCDE

ABCDE is a loop. After an intervention, return to A and repeat through E. Reassessment is essential after oxygen, suction, airway adjuncts, bleeding control, glucose treatment, seizure treatment, movement, analgesia, splinting or any change in the patient's appearance.

“ABCDE → TREAT → ABCDE AGAIN.”
Record what was found, what was done, the time, the response and the next plan. A patient who improves still requires observation because deterioration can recur.

When to stop the primary survey and call for advanced help

Airway cannot be maintained with basic manoeuvres or the patient is rapidly swelling.
Breathing is absent, inadequate, exhausting or associated with persistent severe hypoxia.
Catastrophic haemorrhage continues despite appropriate first-line control.
Shock signs are worsening, the patient collapses or mental status falls.
Seizure is prolonged/recurrent, glucose remains dangerously abnormal or a focal neurological deficit is new.
There is major trauma, suspected spinal injury, burns, drowning, poisoning or pregnancy-related collapse beyond the EMT's resources.

What is a secondary survey?

The secondary survey is a systematic, more detailed examination performed after the primary survey has identified and treated immediate threats. It is appropriate when the patient is stable enough to tolerate it. It may be used for trauma, medical illness, collapse, poisoning and unexplained symptoms. Continuous ABCD observation continues during the secondary survey; if the patient deteriorates, stop and return to ABCDE.

Conditions before beginning the secondary survey

Check	Question	Action if not satisfactory
Primary survey	Have immediate airway, breathing and circulation threats been addressed?	Continue primary treatment; do not begin a long examination.
Stability	Are the patient's vital signs, mental status and appearance stable or improving?	Reassess ABCDE and expedite transport/advanced support.
Analgesia/comfort	Has pain been recognised and managed within scope?	Provide appropriate comfort measures and avoid unnecessary movement.
Privacy/warmth	Can the patient be exposed safely and respectfully?	Use sheets, screens and a warm environment; expose only one region at a time.
Team and equipment	Are monitoring, suction, oxygen and transport resources ready?	Ask for assistance before turning, log-rolling or moving the patient.

History during the secondary survey: SAMPLE and AMPLE

Use a structured history while examining, without allowing questions to delay emergency treatment. SAMPLE is useful for medical emergencies; AMPLE is commonly used in trauma. Use the patient's own words when possible and confirm information with relatives, witnesses, medication packets or referral notes.

Letter	SAMPLE	Questions
S	Signs and symptoms	What is happening now? Where is the pain? What makes it better or worse? What has changed?
A	Allergies	Any medicine, food, latex or environmental allergies? What reaction occurs?
M	Medications	Prescribed, over-the-counter, herbal, contraceptive, insulin, anticoagulant or recreational substances?
P	Past history/pregnancy	Medical and surgical conditions, previous episodes, pregnancy possibility and last menstrual period where relevant.
L	Last oral intake	When and what did the patient last eat, drink or take?
E	Events/environment	What happened before the illness or injury? Mechanism, time, witnesses and treatment already given?

AMPLE trauma history	Key information
Allergies	Medication, latex, food and other reactions.
Medications	Especially anticoagulants, insulin, antiplatelets and sedatives.
Past medical history	Heart/lung disease, diabetes, epilepsy, pregnancy and previous surgery.
Last meal	Time and amount of food/drink; relevant for anaesthesia and aspiration risk.
Events/environment	Mechanism, speed, height, restraint use, ejection, fall surface, violence or blast.

Head-to-toe secondary survey sequence

Head and scalp.
Face, eyes, ears, nose and mouth.
Neck and cervical spine.
Chest and axillae.
Abdomen and flanks.
Pelvis and perineum when indicated.
Back and posterior surfaces.
Upper limbs, hands and neurovascular status.
Lower limbs, feet and neurovascular status.
Repeat vital signs, pain, neurological status and all abnormal findings.

Head and scalp examination

Inspect/palpate	Findings to record	Clinical significance
Scalp	Bleeding, lacerations, swelling, tenderness, depression or foreign body.	Scalp wounds can hide significant blood loss; a depression may suggest fracture.
Face	Symmetry, bruising, swelling, deformity, burns and tenderness.	Facial injury may threaten airway, vision or neurological function.
Eyes	Pupil equality/reactivity, vision complaint, orbital swelling, bleeding or foreign body.	May indicate head injury, orbital trauma or neurological deficit.
Ears/nose	Bleeding, clear fluid, bruising, deformity and obstruction.	May indicate facial/skull trauma or airway compromise.
Mouth	Loose teeth, blood, burns, tongue injury, dentures and secretions.	Important for airway protection and aspiration risk.

Neck and cervical spine

Maintain manual stabilisation and spinal motion restriction when mechanism, symptoms or examination indicate risk.
Inspect for wounds, swelling, bruising, tracheal deviation, distended neck veins and surgical scars.
Ask about midline neck pain, tingling, weakness or inability to move; do not force movement to “test” the spine.
Look for airway swelling, hoarseness, subcutaneous emphysema and penetrating injury.
Palpate only according to training and protocol, and stop if severe pain or neurological symptoms occur.

Chest examination

Area	Inspect	Palpate/assess when appropriate
Front and sides	Wounds, bruising, burns, sucking chest wound, asymmetry and paradoxical movement.	Tenderness, crepitus, chest expansion and air entry.
Back	Posterior wounds, bruising, deformity and pressure injury.	Only during a coordinated turn/log-roll with spinal precautions.
Breathing pattern	Rate, effort, posture, cyanosis and speech.	Repeat SpO₂, respiratory rate and auscultation if trained.
Cardiac clues	Chest pain, sweating, pallor, distress and collapse.	Pulse, blood pressure, rhythm monitoring and 12-lead ECG when available and within service scope.

Abdomen and flanks

Inspect for distension, bruising, seatbelt marks, penetrating wounds, evisceration, pregnancy, surgical scars and visible pulsation. Ask about pain location, onset, radiation and movement. Palpate gently and systematically only when trained, noting tenderness, guarding, rigidity or a palpable mass. Do not repeatedly press an open wound or push protruding organs back inside.

Pelvis and perineum

Look for bruising, bleeding, open wounds, deformity, incontinence or blood at the urethral opening when relevant.
Ask about pelvic pain, inability to stand, numbness, pregnancy and vaginal bleeding in a sensitive, private manner.
Do not repeatedly rock or compress the pelvis; unnecessary movement can worsen haemorrhage.
Cover the patient promptly and use a chaperone or second clinician according to local policy.

Back and posterior surfaces

Inspect the back for wounds, bruising, burns, deformity, tenderness, pressure injuries and objects trapped beneath the patient. A log-roll should be coordinated by enough trained staff, with spinal alignment maintained when indicated. Check the bed or ground for blood and note any object that may have caused injury.

Limbs and neurovascular assessment

Check	What to assess	Document
Look	Deformity, swelling, open wound, bruising, burns, abnormal rotation and colour.	Side, location, size, skin condition and visible blood loss.
Feel	Tenderness, temperature, pulses and sensation.	Exact site, distal pulse and comparison with the other side.
Move	Active movement if safe; do not force an injured limb.	Strength, pain, limitation and patient cooperation.
Circulation	Colour, warmth, capillary refill and distal pulse.	Before and after splinting or repositioning.
Sensation	Numbness, tingling or altered sensation.	Patient's words, distribution and trend.

Special situations and adaptations

Trauma

Use the mechanism of injury to predict hidden problems, but do not allow the mechanism to replace examination.
Consider C-ABCDE when catastrophic haemorrhage is present.
Protect the cervical spine when the mechanism or symptoms suggest risk; avoid unnecessary movement.
Search the entire patient, including the back and areas hidden by clothing or equipment.
Prevent hypothermia and reassess after every movement, dressing, splint or airway intervention.

Medical emergencies

In medical patients, the secondary survey may focus more on symptoms and systems than on trauma. Continue to use ABCDE, then examine the region suggested by the complaint. For chest pain, assess heart and breathing clues; for abdominal pain, assess shock, pregnancy and bleeding; for fever, search for infection and altered mental status; for poisoning, protect the team and identify the agent without delaying supportive care.

Pregnancy and postpartum emergencies

Ask about gestational age, bleeding, abdominal pain, contractions, fetal movement, severe headache, visual symptoms and seizures.
Position to reduce aortocaval compression where appropriate while maintaining airway and breathing support.
Do not dismiss shock, breathlessness, facial swelling or altered response as normal pregnancy changes.
Protect privacy, use a chaperone and follow local obstetric emergency protocols.

Children and infants

Use age-appropriate airway equipment and normal ranges; the child's appearance, interaction with the caregiver, tone, feeding and work of breathing are important.
Calculate or confirm weight when medication or equipment selection requires it, using local protocols.
Do not separate a frightened child from a caregiver unnecessarily; observe while the caregiver comforts them.
Remember that hypotension can be a late sign of paediatric shock; treat worsening appearance, perfusion and response seriously.

Older adults and frail patients

Ask about baseline cognition, mobility, communication, medication and recent functional change.
Look for subtle deterioration: new confusion, reduced appetite, a fall, weakness, drowsiness or inability to perform a usual task.
Prevent hypothermia and skin injury during exposure and movement.
Review anticoagulants, antiplatelets, insulin, sedatives and multiple medicines during the history.

Low-resource and pre-hospital considerations

When monitors, oxygen, suction or advanced clinicians are limited, careful observation and repeated basic measurements become even more important. Use a watch for respiratory rate, manual pulse and blood pressure when available, a thermometer, a glucose meter and direct patient/witness history. Make early transport decisions, communicate with the receiving facility and improvise only within training and approved local protocols.

Clinical scenarios

Scenario 1: Severe asthma with a silent chest

A 24-year-old patient is sitting forward, exhausted, unable to speak and has very little audible wheeze. The respiratory rate is high and the patient is becoming drowsy.

Reasoning: Less wheeze is not improvement when air movement is falling. Treat as impending respiratory failure: airway/breathing support, emergency escalation, monitoring and rapid transport.

Scenario 2: Road-crash haemorrhage

A motorcyclist has heavy bleeding from the thigh, pale clammy skin and increasing restlessness. He has a noisy airway but is still answering.

Reasoning: Use C-ABCDE. Control catastrophic bleeding while another team member manages airway and spinal protection. Reassess after the haemorrhage intervention.

Scenario 3: Confusion after a missed meal

A diabetic patient is sweaty, irritable and unable to answer appropriately. There is no obvious trauma and breathing is adequate.

Reasoning: Disability comes early: check glucose, protect the airway, treat according to protocol and repeat consciousness/glucose assessment. Do not give oral sugar to a patient who cannot swallow safely.

Scenario 4: Hidden posterior injury

A patient who fell from a roof has a normal-looking front examination but severe back pain and tingling in both legs.

Reasoning: Maintain spinal precautions, perform a coordinated log-roll only when necessary, inspect the back and document motor/sensory findings. The secondary survey can reveal threats not visible from the front.

Scenario 5: Anaphylaxis with a “normal” blood pressure

A patient develops hives, facial swelling, wheeze and hoarseness after an injection. The first blood pressure is normal.

Reasoning: Do not wait for hypotension. The combination of airway and breathing signs is high risk; activate the anaphylaxis pathway, call for help and reassess continuously.

Scenario 6: Stable enough for secondary survey—then deterioration

After a primary survey, a trauma patient is talking and has improving vital signs. During the abdominal examination, the patient becomes pale, sweaty and less responsive.

Reasoning: Stop the secondary survey and return immediately to ABCDE. Look for haemorrhage or another new threat; the secondary survey is never more important than a deteriorating primary survey.

Common mistakes in ABCDE and secondary survey

Mistake	Why it is dangerous	Correct approach
Completing A–E without treating abnormalities	Life-threatening problems remain untreated while the examiner continues.	Stop, treat, call for help and then continue.
Taking a long history before looking at breathing	Respiratory failure can progress during questioning.	First look, primary survey, then focused history.
Ignoring catastrophic bleeding because the patient is talking	Compensated shock can deteriorate suddenly.	Control severe haemorrhage first when present.
Relying on one SpO₂ or blood-pressure value	Technical error and compensated shock can mislead.	Assess trends and the full clinical picture.
Forcing a breathless patient flat	May worsen ventilation and distress.	Use the position of comfort unless contraindicated.
Repeated pelvic rocking or unnecessary spinal movement	May worsen bleeding or neurological injury.	Move only with a clear indication and a coordinated team.
Exposing the patient and leaving them cold	Hypothermia worsens trauma and shock.	Expose one area at a time, cover promptly and monitor temperature.
Failing to repeat the examination after treatment	Response and deterioration are missed.	Use the ABCDE loop and document the trend.

Documentation and handover template

Section	Record
Time and context	Time found/first assessed, location, mechanism or chief complaint, number of patients and scene hazards.
Primary survey	Catastrophic haemorrhage, airway, breathing, circulation, disability and exposure findings in order.
Interventions	What was done, by whom, exact time, equipment/size when relevant and response.
Vital trends	Respiratory rate, SpO₂, pulse, blood pressure, temperature, glucose, pain and consciousness over time.
Secondary survey	Head-to-toe findings, SAMPLE/AMPLE history, injuries found, neurovascular status and negative findings that matter.
Handover	Patient identification, situation, background, assessment, treatment, response, concerns and recommended next action.

Example handover: “This is a 36-year-old male, motorcycle crash at 14:10. On arrival he had uncontrolled right-thigh bleeding, noisy airway and pale clammy skin. C-ABCDE completed: bleeding controlled with tourniquet at 14:14; airway now patent after suction; respirations 30 with right-sided reduced air entry; pulse 124 weak, BP 92/58; ACVPU A but increasingly restless. Secondary survey not completed because perfusion is worsening. Advanced trauma support and urgent transfer requested.”

Practical ABCDE checklist

Scene safe, PPE applied and help requested early.
Catastrophic haemorrhage identified and controlled when present.
Airway open, sounds assessed, suction/adjuncts available and spinal precautions considered.
Breathing rate, effort, chest movement, sounds, colour and SpO₂ assessed.
Circulation: bleeding, pulse, skin, blood pressure, perfusion and shock trend assessed.
Disability: AVPU/ACVPU or GCS, pupils, glucose, seizures and focal deficits assessed.
Exposure completed safely with warmth, privacy and a search for hidden injury.
Life threats treated immediately, then ABCDE repeated.
Secondary survey begun only when stable enough and stopped if deterioration occurs.
History, findings, interventions, times and trends documented and handed over.

Revision questions

What does ABCDE stand for, and why is the sequence important?
When should a C-ABCDE sequence be used?
List five signs of upper-airway obstruction.
Why can a clear spoken answer fail to guarantee a safe airway?
What is the difference between a head-tilt/chin-lift and jaw thrust?
List six findings that indicate severe breathing compromise.
Why can a “silent chest” in severe asthma be dangerous?
Describe the steps for assessing circulation in a shocked patient.
Why can shock be present before hypotension develops?
What are the main components of the disability assessment?
Why should glucose be checked in altered mental status?
What does exposure involve, and how do you prevent hypothermia?
State the conditions that should be met before beginning a secondary survey.
Write out SAMPLE and AMPLE and give one question for each letter.
List the regions covered by a head-to-toe secondary survey.
Why should the pelvis not be repeatedly rocked?
What neurovascular findings should be recorded after a limb injury or splint?
Give four reasons to stop a secondary survey and return to ABCDE.
Explain why the ABCDE approach is a loop rather than a single checklist.
Write a concise handover for a deteriorating trauma patient using objective findings.

Key takeaways

ABCDE identifies and treats physiological threats before a definitive diagnosis is available.
Treat life-threatening abnormalities as soon as they are found, call for help and reassess after every intervention.
C-ABCDE gives catastrophic haemorrhage priority in major trauma.
The secondary survey is a detailed head-to-toe examination and focused history performed only after immediate threats are controlled.
Exposure must balance finding hidden injuries with privacy, warmth and dignity.
A changing trend is often more important than one reassuring measurement.
Clear documentation and handover are clinical safety interventions.

References and further study

Clinical note: This page is for emergency medical care education. Perform procedures only within your training and scope of practice, and follow current Uganda Ministry of Health, ambulance-service and receiving-facility protocols.

ABCDE Approach to Emergency Examination and Secondary Survey Read More »

General Appearance in Emergency Physical Examination

Why this matters in emergency care: The first visual impression is a clinical assessment, not a casual glance. Before the monitor is attached, an emergency medical technician can often recognise respiratory distress, shock, severe infection, trauma, neurological deterioration, poisoning, or airway compromise from the way a patient looks, sits, moves, speaks and responds. This page focuses on the patient's general appearance—skin, colour changes, skull and face, behaviour, level of consciousness and response—so that the learner can notice danger early, communicate it clearly and begin the correct emergency pathway. It does not replace a complete ABCDE examination, vital signs or a focused history.

Learning outcomes

By the end of this lesson, an emergency medical care student should be able to:

Describe general appearance using objective, respectful clinical language rather than labels such as “looks bad” or “looks drunk.”
Perform a rapid first-look survey without delaying life-saving care.
Inspect skin colour, temperature, moisture, integrity, rashes, pallor, cyanosis, mottling and flushing in every skin tone.
Recognise and document jaundice by inspecting the sclerae, oral mucosa and skin in suitable light.
Identify skull, scalp and facial findings that suggest trauma, airway danger or neurological deficit.
Assess interaction, behaviour, speech, alertness and response using AVPU/ACVPU while escalating an altered level of consciousness.
Integrate appearance with breathing effort, circulation, pain, hydration, nutrition, age, pregnancy, disability and the patient's normal baseline.
Give a concise handover and record time-stamped, observable findings that can be compared during reassessment.

What is meant by “general appearance”?

General appearance is the overall impression obtained at the moment of first contact and during the first few minutes of observation. It includes the patient's apparent illness severity, posture, activity, facial expression, interaction, speech, skin colour, visible work of breathing, cleanliness, body build and the presence of obvious injury or distress. It is a screening assessment: it helps the EMT decide who needs immediate attention and what to assess next, but it is not a final diagnosis.

Appearance must be interpreted with context. A patient who is naturally quiet, has a communication disability, has taken prescribed sedatives, or is frightened may look different from a healthy, talkative adult. Ask the patient, caregiver or witness what is normal for them, then compare the current appearance with that baseline.

The first 10-second look

Pause at the doorway or beside the patient for a safe, deliberate look. Maintain scene safety, introduce yourself and avoid crowding the patient. At the same time, ask: Does this person look immediately threatened, seriously ill, injured, or unable to protect their airway?

Safety and environment: Look for fire, electricity, traffic, violence, chemicals, blood, vomit, medicines, an oxygen cylinder, a fall height or other hazards.
Position: Is the patient sitting forward to breathe, lying still, curled in pain, guarding an injury, fitting, or found in an unsafe position?
Interaction: Do they make eye contact, follow a command and answer appropriately? Do they appear confused, frightened, agitated, withdrawn or drowsy?
Breathing effort: Look for inability to speak full sentences, noisy breathing, accessory-muscle use, gasping, cyanotic lips, severe sweating or exhaustion.
Colour and perfusion: Observe the face, lips, tongue, conjunctivae and exposed skin for pallor, grey/blue colour, jaundice, mottling or unusual flushing.
Obvious injury: Search visually for bleeding, deformity, swelling, burns, bruising, wounds, vomit, a medical alert bracelet or medication packets.

Immediate danger rule: If the person is unresponsive, gasping, severely breathless, actively bleeding, seizing, rapidly swelling around the face or neck, or showing signs of shock, call for help and begin the appropriate emergency assessment immediately. Do not delay ABCDE care to complete a descriptive appearance paragraph.

Domains of general appearance

Domain	What the EMT observes	Why it changes urgency
Posture and movement	Tripod position, guarding, rigidity, collapse, tremor, abnormal movements, inability to sit or walk.	May signal respiratory distress, pain, shock, seizure, weakness or spinal injury.
Interaction and behaviour	Alert cooperation, agitation, fear, confusion, unusual sleepiness, withdrawal or combativeness.	May be the earliest visible sign of hypoxia, hypoglycaemia, shock, sepsis, intoxication or neurological injury.
Speech and voice	Clear or slurred speech, aphasia, hoarseness, muffled voice, inability to speak full sentences.	Can indicate airway swelling, stroke, altered mental status or severe respiratory compromise.
Skin and colour	Pallor, cyanosis/grey colour, jaundice, flushing, mottling, sweat, rash, bleeding, burns or poor integrity.	May reveal inadequate oxygenation, perfusion failure, infection, allergic reaction, liver disease or trauma.
Face and skull	Symmetry, swelling, bruising, deformity, scalp bleeding, facial droop, eye position and oral secretions.	May reveal head injury, stroke, anaphylaxis, airway obstruction or toxic exposure.
Body habitus and nourishment	Cachexia, obesity, oedema, pregnancy, frailty, muscle wasting or dehydration signs.	Influences airway, positioning, drug/transport planning and likely physiological reserve.
Cleanliness and self-care	Soiled clothing, urine/faeces, neglected wounds, lice, poor hygiene or unusual disarray.	May indicate disability, social vulnerability, delirium or prolonged illness; it is never proof of neglect or intoxication.

“Sick” or “not sick”: a clinical impression, not a dismissal

Experienced clinicians often describe a patient as “well appearing” or “ill appearing,” but an EMT must support that impression with observable details. “Ill appearing” might mean pale and sweaty, unable to sit upright, staring blankly, breathing with marked effort, or not recognising a caregiver. “Well appearing” means the patient is interacting normally, moving comfortably, has normal colour for them and shows no obvious distress; it does not rule out hidden disease.

Vague statement to avoid	Objective alternative
“Patient looks bad.”	“Patient is pale, clammy, hunched forward, speaks in two-word phrases and follows commands slowly.”
“Patient is drunk.”	“Alcohol odour noted; speech slurred; gait unsteady; orientation and blood glucose still require assessment.”
“Patient is lazy.”	“Patient remains supine, opens eyes to voice and reports severe generalized weakness.”
“Skin is normal.”	“Skin warm and dry; colour consistent with baseline; no visible rash, bleeding or cyanosis.”
“Confused.”	“States name correctly but cannot state place or month; repeatedly asks the same question.”

Respect, consent and privacy during visual assessment

Explain what you are looking for and ask permission before exposing skin or touching the face, scalp or mouth.
Expose only the area needed, use a sheet and preserve dignity, especially for children, survivors of assault and patients of a different gender.
Use neutral descriptions. Do not equate body size, poverty, clothing, disability, mental illness or cultural dress with poor compliance or disease.
Use an interpreter or communication aid when language, hearing, speech, cognition or literacy makes the first impression unreliable.
Do not photograph a patient or share identifying information unless local policy and consent permit it.

A practical observation sequence

Use the same sequence on every call so that important findings are not missed:

Scene and patient safety.
Distance look: posture, movement, breathing effort, skin colour and obvious bleeding.
Approach and greet: response, speech, orientation and distress.
Face and head: symmetry, swelling, trauma, airway clues and jaundice.
Skin: colour, moisture, temperature by touch when safe, rash, wounds, perfusion and exposure.
Compare with baseline and reassess after every intervention.

Skin assessment: observe before you touch

The skin can provide rapid information about oxygenation, circulation, temperature regulation, allergy, infection, trauma and chronic illness. Start with exposed areas, then inspect further only when clinically necessary. Use adequate natural or white light; coloured room lighting can make pallor, jaundice and cyanosis difficult to judge. Record what you actually see rather than assigning a cause that has not been confirmed.

What to inspect on the skin

Feature	How to assess	Possible emergency meaning
Colour	Compare face, lips, tongue, conjunctivae, palms, nail beds and exposed skin with the patient's baseline.	Pallor, cyanosis/grey colour, jaundice, flushing or mottling may indicate oxygenation, perfusion, infection or metabolic problems.
Moisture	Look for sweat on the forehead, upper lip, neck and palms; distinguish sweat from water or rain.	Cold clamminess may accompany shock, hypoglycaemia, pain or cardiac disease; hot sweating may accompany fever or heat illness.
Temperature	Use the back of the hand on an accessible area; compare both sides and use a thermometer for measurement.	Cool extremities can indicate poor perfusion or exposure; very hot, dry skin suggests heat illness but does not by itself confirm it.
Integrity	Look for wounds, burns, ulcers, pressure injury, bleeding, bites, needle marks and skin tears.	May identify trauma, sepsis source, chemical injury, safeguarding concerns or prolonged immobilisation.
Rash and lesions	Note location, pattern, colour, raised/flat character, blisters, petechiae and whether it blanches when appropriate.	Non-blanching petechiae/purpura with fever or toxicity is a red flag; urticaria with swelling or breathing difficulty suggests anaphylaxis.
Oedema	Observe face, eyelids, hands, ankles and legs; compare left and right.	May occur with allergy, heart/renal disease, pregnancy complications, venous obstruction or trauma.

Pallor and reduced colour

Pallor is a loss of the patient's usual colour. It may reflect anaemia, vasoconstriction, blood loss, shock, fear, hypothermia or fainting. In an emergency, pallor is more concerning when it is new and accompanied by cool sweat, weakness, dizziness, fast breathing, a weak pulse, abdominal pain, bleeding or reduced responsiveness.

Inspect the lower eyelid conjunctiva, lips, tongue, oral mucosa and palms rather than relying on facial skin alone.
Compare with a known baseline and with areas not exposed to cold or pressure.
Ask about bleeding, pregnancy, heavy menstruation, black stool, vomiting blood, sickle-cell disease and chronic anaemia when appropriate.
Do not diagnose anaemia from colour alone; obtain vital signs, glucose and other assessments within scope.

Cyanosis and grey colour

Cyanosis is a blue or grey colour caused by increased deoxygenated haemoglobin. Central cyanosis involves the lips, tongue or oral mucosa and is especially concerning because it may represent inadequate arterial oxygenation. Peripheral blue colour can occur with cold or poor local perfusion, but it still requires correlation with the whole patient. Cyanosis is a visual sign—not a substitute for respiratory assessment or pulse oximetry.

Look for	Why it matters	EMT action
Blue/grey lips or tongue	Possible central cyanosis, severe respiratory or cardiac problem.	Call for help, assess airway and breathing immediately, check oxygen saturation if available and provide care under local protocol.
Blue nail beds or fingers only	May be cold-induced peripheral vasoconstriction or local perfusion failure.	Warm and reassess when safe; compare both sides and check central colour, breathing and circulation.
Grey, ashen or dusky face	Can accompany hypoxia, shock, severe pain or impending collapse.	Do not wait for a “blue” appearance; begin an ABCDE assessment and escalate early.

Skin-tone aware practice: In brown or Black skin, colour change may be easier to see in the lips, gums, tongue, conjunctivae, nail beds, palms, soles and inside the eyelids than on the cheek or forearm. Grey or ashen change may be more obvious than bright blue. Use pulse oximetry, respiratory effort, mental status and perfusion findings together; never dismiss a deteriorating patient because cyanosis is hard to see.

Mottling, flushing and abnormal warmth

Mottling: irregular patchy colour, often on knees, limbs or trunk. It may reflect peripheral vasoconstriction, poor perfusion, hypothermia or severe illness. Compare over time.
Flushing: unusually red or warm appearance may occur with fever, heat exposure, vasodilation, allergic reaction, anxiety or some drugs.
Hot, dry skin: raises concern for heat illness when combined with high body temperature, headache, confusion or collapse; measure temperature and move to a safer environment while following protocol.
Cold, clammy skin: treat as a warning sign when accompanied by weakness, chest discomfort, breathlessness, bleeding, abdominal pain or altered behaviour.

Jaundice: a visible clue, not a diagnosis

Jaundice (icterus) is yellow discolouration caused by raised bilirubin. It is often first noticed in the sclerae, then the skin and oral mucosa. Mild jaundice is easiest to see in natural or neutral white light. Yellow skin alone can be caused by lighting, cosmetics or dietary pigments, so inspect the sclerae and mucosa and document exactly what is seen.

How to inspect for jaundice

Explain the examination and ask the patient to look up gently while you inspect both sclerae.
Use daylight or a neutral examination light; do not rely on yellow room lighting.
Inspect the underside of the tongue and oral mucosa if safe and acceptable.
Look at the face, trunk and palms for a general yellow hue and compare with the patient's baseline.
Look for associated appearance clues: dark urine staining, pale stools reported by the patient, itching, scratch marks, abdominal swelling, bruising, confusion, fever or vomiting.
Document “scleral icterus noted” or “no visible scleral icterus” rather than assigning hepatitis or liver failure without assessment.

Jaundice patterns and emergency questions

Appearance or associated clue	Possible direction for assessment	Urgent questions/actions
Yellow sclerae with fever and right-upper-abdominal pain	Possible infection or inflammation of the hepatobiliary system.	Check temperature, perfusion and mental status; escalate if toxic, hypotensive or confused.
Jaundice with confusion, drowsiness or unusual behaviour	Possible severe systemic, hepatic, infectious or metabolic illness.	Assess glucose, ABCDE and response immediately; do not attribute confusion to jaundice alone.
Jaundice with bruising or bleeding	Possible coagulopathy, severe liver disease or another bleeding disorder.	Look for external bleeding, protect from trauma and escalate urgently.
Yellow skin but clear sclerae after heavy intake of yellow/orange foods	Carotenemia or lighting may mimic jaundice.	Record the finding, ask history and seek clinical review; do not label it jaundice without scleral or mucosal evidence.

Red flag: Jaundice is not usually an isolated reason for emergency transport, but jaundice with altered consciousness, shock, fever, severe abdominal pain, active bleeding, repeated vomiting or rapidly worsening illness is an emergency presentation. Treat the patient's physiology first.

Skin documentation language

Use a fixed order so another clinician can understand the finding: colour → temperature → moisture → integrity → lesions/rash → perfusion → change from baseline.

Example: “At 14:20, skin warm and dry; colour consistent with baseline on face and palms; no central cyanosis or scleral icterus; scattered non-blanching purple spots on both lower legs; patient reports fever since last night.”

Skull and scalp: a rapid trauma screen

Inspect the head before moving it unnecessarily. In a fall, road crash, assault or unwitnessed collapse, the scalp may hide a large blood loss and a skull injury may coexist with cervical spine injury. Keep manual in-line stabilisation and follow local spinal precautions when the mechanism or examination suggests risk.

Inspect	Possible finding	Why it matters
Scalp and hair	Active bleeding, laceration, swelling, bruising, embedded object, blood or clear fluid.	Scalp wounds can bleed heavily; fluid from nose/ear after trauma may suggest a significant head injury.
Skull contour	Depression, step-off, unusual asymmetry or tenderness.	May suggest skull fracture; do not press repeatedly or probe a wound.
Face and jaw	Swelling, deformity, bruising, loose teeth, blood, burns or inability to open the mouth.	Facial trauma can threaten the airway and may impair ventilation or suctioning.
Ears and nose	Bleeding, fluid, bruising behind the ear, foreign body or nasal obstruction.	May indicate trauma, airway obstruction or toxic exposure; protect the airway and escalate.
Eyes	Unequal pupils, orbital swelling, gaze deviation, bruising or inability to open eyes.	May indicate neurological injury, facial trauma, poisoning or stroke; assess alongside consciousness.

Facial symmetry and neurological clues

Ask the patient to smile, show teeth or raise the eyebrows only when safe and when doing so will not delay urgent care. Observe at rest and during speech. A new one-sided facial droop, asymmetric smile, inability to close one eye, sudden speech change or gaze deviation can indicate stroke or another neurological emergency. Facial asymmetry can also result from old injury, Bell palsy or normal anatomy, so ask when it started and compare with a caregiver or previous photograph when appropriate.

Note whether the droop involves the mouth, forehead or both sides.
Check whether speech is slurred, words are incorrect, or the patient cannot understand commands.
Ask for the exact last-known-well time when a new neurological deficit is suspected.
Keep the patient nil by mouth until swallowing safety is assessed by an appropriate clinician if stroke is suspected.
Do not allow a “normal-looking” face to overrule altered consciousness, weakness or a concerning history.

Face and airway warning signs

Visible appearance	Possible emergency	Immediate priority
Lip, tongue or facial swelling; hives; anxious distress	Anaphylaxis or angioedema.	Call for help, assess airway and breathing, and follow the local anaphylaxis protocol promptly.
Hoarse or muffled voice, drooling, tripod posture	Upper-airway obstruction or swelling.	Keep the patient in the position of comfort, avoid unnecessary throat examination and prepare for rapid airway deterioration.
Blood, vomit or secretions around the mouth	Trauma, seizure, aspiration or reduced airway protection.	Suction/airway support within scope; use spinal precautions if indicated and reassess response.
One-sided droop with new speech difficulty	Possible stroke.	Record last-known-well time, check glucose and activate the stroke pathway according to local service arrangements.
Burns around nose/mouth, soot or singed hair	Inhalation injury after fire or smoke exposure.	Move to safety, assess airway early and request advanced support.

Mouth, lips and tongue as an appearance window

Look for central cyanosis, dryness, bleeding, vomit, swelling, burns, secretions, loose teeth, dentures or a foreign body.
Dry cracked lips and a dry tongue may support dehydration but are not diagnostic by themselves.
Swollen tongue, drooling, inability to swallow or a muffled voice may precede airway obstruction.
Fruity breath can be a clue to ketoacidosis; a strong chemical, solvent or alcohol odour may indicate exposure, but smell never proves the diagnosis.
Do not place fingers into a seizing or combative patient's mouth and never attempt to remove a firmly embedded object blindly.

Level of consciousness and level of response

Level of consciousness (LOC) describes how awake and aware a person is. Level of response describes what stimulus is required to obtain a purposeful response. A patient may have eyes open but be confused, or may be asleep yet wake and answer appropriately. Document the actual response and compare it with baseline; a falling level of response is an emergency even when the skin looks normal.

AVPU/ACVPU rapid response screen

Letter	Finding	Example documentation
A – Alert	Awake, makes appropriate contact and responds spontaneously.	“Alert; answers name, place and situation appropriately.”
V – Voice	Does not respond normally until spoken to or called loudly.	“Eyes open to voice; answers slowly; drifts back to sleep.”
P – Pain/pressure	No response to voice but responds to an appropriate painful stimulus performed by trained staff.	“No response to voice; localises to pressure; airway maintained.”
U – Unresponsive	No purposeful response to voice or appropriate stimulus.	“Unresponsive; abnormal breathing observed; emergency response activated.”
C – Confusion (ACVPU)	New confusion is identified even if the patient is awake.	“ACVPU: C; new disorientation compared with caregiver baseline.”

Remember: “A is not automatically okay.”
An alert patient can still have hypoxia, shock, stroke, severe pain, sepsis, hypoglycaemia or poisoning. Pair the response score with speech, skin, breathing effort, circulation, glucose, vital signs and the history.

Assessing alertness without creating a false result

Approach from the front, identify yourself and speak in a normal voice.
Ask a simple question such as “What is your name?” or “What happened?” and observe whether the answer is appropriate.
Give one simple command, such as “Open your eyes” or “Squeeze my fingers,” if there is no obvious injury preventing it.
If there is no response, call for help and follow the local emergency assessment protocol; do not repeatedly shake the patient.
Record the time, stimulus, response and any change after oxygen, glucose, seizure termination or other intervention within scope.

Behaviour, mood and mental-status appearance

Behaviour is part of the examination. Sudden agitation, restlessness, fear, aggression, withdrawal or unusual quietness can be physiological deterioration rather than a “difficult personality.” Consider hypoxia, hypoglycaemia, shock, infection, head injury, pain, intoxication, withdrawal, psychiatric illness and environmental fear. Protect staff and patient, use de-escalation and request additional help early.

Observed behaviour	Important possibilities to consider	Safety-focused response
Restless, pulling at oxygen or lines	Hypoxia, delirium, pain, urinary retention, withdrawal or fear.	Check airway/breathing, glucose and vital signs; reduce stimulation and avoid unnecessary restraint.
Suddenly quiet or unusually sleepy	Hypercapnia, hypoglycaemia, seizure/postictal state, poisoning, shock or intracranial injury.	Repeat response assessment and escalate; do not assume the patient is “resting.”
Agitated and sweaty with tremor	Hypoglycaemia, shock, stimulant use, pain or withdrawal.	Check glucose promptly where available and follow emergency protocols.
Withdrawn, tearful or fearful	Pain, trauma, safeguarding concern, anxiety, language barrier or delirium.	Provide privacy, a calm explanation and a trusted support person/interpreter where possible.

Speech and voice as appearance findings

Inability to speak full sentences: may indicate severe breathlessness, exhaustion or airway compromise.
Hoarse, whispering or muffled voice: consider laryngeal swelling, smoke inhalation or upper-airway pathology.
Slurred speech: assess glucose, trauma, stroke and drugs/alcohol rather than assuming intoxication.
Aphasia: inability to produce or understand language can be a focal neurological sign.
New abnormal cry or weak voice in a child: consider respiratory compromise, pain, sepsis or neurological deterioration.

Connecting appearance to the patient's normal baseline

Ask “How are they different from normal?” to a caregiver, family member, colleague or the patient. Baseline information is essential for people with dementia, developmental disability, chronic neurological disease, previous stroke, communication impairment or long-standing jaundice. Document who supplied the baseline and the time the change was first noticed.

Baseline question	Why it matters
“When were they last seen completely normal?”	Supports stroke, seizure, poisoning and altered-consciousness pathways.
“Do they normally talk and walk like this?”	Separates chronic disability from new neurological or physiological deterioration.
“Is this skin colour usual for them?”	Prevents misinterpretation of natural variation, chronic disease or lighting.
“What medicines, alcohol or substances may they have taken?”	Identifies possible sedation, hypoglycaemia, overdose or withdrawal.

Visible breathing distress belongs in the appearance assessment

This page does not replace the dedicated respiration lesson, but the first look should recognise visible respiratory compromise. Look for a tripod position, nasal flaring, intercostal recession, head bobbing in an infant, pursed lips, paradoxical breathing, gasping, noisy breathing, inability to speak, exhaustion and a change in colour or response. A patient who appears tired after a period of severe effort may be deteriorating, not improving.

Connect the signs: “Sitting upright, sweating, blue-grey lips, unable to speak more than two words and becoming drowsy” is a high-risk appearance. Begin the airway/breathing response immediately; do not wait to finish a head-to-toe description.

Visible circulation and shock clues

Shock may first appear as a change in behaviour and skin before blood pressure falls. Look for pallor or grey colour, cold clammy skin, mottling, sweating, weakness, faintness, a vacant stare, anxiety, restlessness, slowed responses and collapse. Search for external blood loss and consider hidden bleeding after trauma, pregnancy, gastrointestinal symptoms or anticoagulant use.

Appearance combination	Concern	What to do next
Pale + sweaty + weak/near-faint	Reduced perfusion, blood loss, cardiac disease, hypoglycaemia or pain.	Lay/position safely according to symptoms and trauma risk, check ABCDE, glucose and vital signs, and escalate.
Cool mottled limbs + confusion	Compensated or worsening shock, sepsis, hypothermia or severe cardiac illness.	Prevent heat loss, reassess frequently and request urgent clinical support.
Warm flushed skin + fever + altered behaviour	Sepsis, heat illness or another systemic process.	Measure temperature, assess perfusion and mental status, and activate the relevant pathway.
Uncontrolled visible bleeding	Immediate threat to life.	Apply direct pressure/tourniquet according to training and protocol while calling for help.

Hydration, nutrition and body habitus

General appearance includes the patient's reserves and physical context. Observe dry lips, a dry tongue, sunken eyes, reduced muscle bulk, oedema, obesity, frailty, pregnancy or an unusually thin body habitus. These observations do not diagnose dehydration or malnutrition but help plan safe care, lifting, positioning, vascular access and transport.

Ask about vomiting, diarrhoea, reduced intake, thirst, urine output and heat exposure when dehydration is possible.
Look for bilateral ankle oedema, facial puffiness or one-sided limb swelling, then correlate with breathing and circulation.
Use respectful language such as “frail appearance” or “marked muscle wasting,” and avoid stigmatising labels.
Consider pressure injury risk in an immobile, unconscious or very frail patient; protect skin during movement.

Pain and distress in the face and body

Pain may be visible as grimacing, guarding, moaning, sweating, rocking, a rigid posture, reluctance to move or a child clinging to a caregiver. Some patients have little facial expression despite severe pain. Ask directly, use a validated pain scale when possible and observe non-verbal cues. Sudden severe pain with pallor, sweating, collapse or altered response is an emergency pattern.

Infection and sepsis appearance

Look beyond temperature. A patient with serious infection may appear very unwell, unusually sleepy, confused, mottled, pale, breathless, weak or unable to stand. Search visually for a rash, wound, infected line, cellulitis, surgical site, pressure injury, meningococcal-type non-blanching lesions or an obvious source. Appearance alone cannot diagnose sepsis, but deterioration in behaviour, perfusion or breathing warrants urgent escalation.

Poisoning and intoxication: avoid anchoring

Odour, unusual pupils, sweating, vomiting, tremor, drowsiness, agitation, ataxia and abnormal speech can suggest poisoning, but the same signs occur in stroke, hypoglycaemia, head injury, sepsis and hypoxia. Treat “intoxicated” as a possibility to investigate, not a conclusion. Secure the scene, protect yourself from contamination, check glucose and follow toxicology or poison-centre arrangements where available.

Special considerations in infants and children

Observe	Age-sensitive clue	Escalation concern
Interaction with caregiver	Child normally engages, tracks, smiles or cries strongly; a floppy, vacant or inconsolable child is abnormal.	Reduced response, poor tone or inability to console may indicate serious illness.
Work of breathing	Nasal flaring, grunting, head bobbing, chest recession and poor feeding may be early signs.	Apnoea, exhaustion, central colour change or inability to feed is urgent.
Skin and rash	Assess lips, tongue, conjunctivae, palms/soles and pressure areas; inspect for non-blanching rash.	Grey/pale appearance, mottling, petechiae with fever or a rapidly spreading rash require immediate review.
Fontanelle and head	Bulging or markedly sunken fontanelle, scalp injury or abnormal cry may be significant.	Interpret with age, crying, hydration and the whole clinical picture; avoid forceful pressure.

Older adults and frail patients

Acute confusion, reduced appetite, a fall, new incontinence or a small functional decline may be the visible presentation of serious illness.
Fever may be absent; observe breathing effort, colour, interaction, skin temperature and mobility.
Thin skin bruises easily, so record the location and appearance of bruises and ask about anticoagulants or trauma.
Hearing aids, glasses and dentures can change interaction; replace them when safe before deciding that the patient is confused.

Pregnancy and postpartum appearance

Pregnancy changes normal appearance, posture, skin pigmentation and breathing. Do not dismiss breathlessness, severe headache, facial/hand swelling, visual changes, pallor, abdominal pain, vaginal bleeding or altered response as “normal pregnancy.” In a postpartum patient, sudden distress, pallor, heavy bleeding, chest pain or collapse needs immediate emergency assessment.

Patients with disability or communication barriers

Ask the patient how they communicate and what their usual behaviour, movement, speech and skin colour are.
Address the patient directly, not only the caregiver; allow extra time for a response.
Do not interpret an eye-gaze device, repetitive movement, silence or limited speech as lack of consciousness without checking the person's established communication method.
Use a professional interpreter when language is a barrier; do not rely on a child to interpret a critical assessment.

Appearance findings that demand immediate escalation

Red flag appearance	Likely immediate priority
Unresponsive, gasping or abnormal breathing	Call resuscitation help and start the appropriate life-support sequence.
Blue/grey lips or tongue, severe respiratory effort or exhaustion	Airway and breathing emergency; provide oxygen/ventilation support within scope.
Sudden facial droop, new speech deficit or one-sided weakness	Stroke pathway, glucose check and time-last-known-well.
Facial/tongue swelling, hives, hoarse voice or drooling	Possible anaphylaxis/airway compromise; activate protocol immediately.
Pale/clammy/mottled skin with weakness or confusion	Possible shock; control bleeding, keep warm and seek urgent help.
Fever or toxic appearance with non-blanching rash	Immediate clinical review and infection/sepsis precautions.
Head trauma with worsening drowsiness, vomiting or unequal pupils	Spinal/neurological emergency; prevent secondary injury and escalate.

Integrating appearance with primary assessment

General appearance is the bridge between the first look and a structured emergency assessment. Use it to recognise who needs immediate attention, then move through the service's ABCDE process. Treat life-threatening findings as soon as they are identified, reassess after each intervention and call for additional help early. WHO/ICRC Basic Emergency Care and Resuscitation Council guidance emphasise this systematic, repeatable approach.

Look: identify immediate threats from posture, colour, breathing, bleeding and response.
Act: call for help and correct an immediately reversible threat within your training and protocol.
Measure: obtain vital signs, glucose, oxygen saturation and a more formal consciousness score as indicated.
Ask: obtain focused history, medication/substance information, allergies and baseline.
Reassess: compare appearance, response, colour and work of breathing after every intervention and during transport.

Clinical scenarios for EMT students

Scenario 1: The “anxious” patient who is actually hypoxic

A 58-year-old man sits leaning forward, grips the edge of the chair, sweats and answers in two-word phrases. His lips look grey in neutral light. He says he is “just nervous.”

Reasoning: posture, speech limitation, sweating and grey lips are danger signs. Do not reassure and leave. Call for help, assess airway/breathing, attach monitoring if available and follow the local oxygen/respiratory distress protocol.

Scenario 2: Facial droop after a normal-looking morning

A woman is awake and talking but her smile is asymmetric and her words are suddenly unclear. Her sister says she was normal at 08:10.

Reasoning: alert appearance does not exclude stroke. Record 08:10 as the last-known-well time, check glucose, assess response and activate the stroke pathway without delaying transport.

Scenario 3: Jaundice with worsening confusion

A man has yellow sclerae, a drowsy vacant expression and a caregiver reports that he is “not himself.” He is warm and tachypnoeic.

Reasoning: the emergency is the combination of jaundice, altered behaviour and abnormal physiology. Begin ABCDE, check glucose and temperature, assess perfusion and seek urgent senior support; do not conclude that the patient is simply tired.

Scenario 4: Cold, clammy and pale after a road crash

A young adult is alert but pale, sweaty, restless and holding the left upper abdomen. There is blood on the clothing and no obvious large external wound.

Reasoning: hidden bleeding and shock are possible. Control visible bleeding, maintain spinal precautions when indicated, keep the patient warm, perform rapid primary assessment and expedite definitive care.

Scenario 5: “Drunk” appearance after a fall

A patient has an alcohol odour, slurred speech and a scalp laceration. He becomes harder to wake over 10 minutes.

Reasoning: intoxication must not explain away a deteriorating level of response. Consider head injury, hypoglycaemia and poisoning; reassess airway, glucose and neurological status urgently.

Scenario 6: Child with fever and a non-blanching rash

A child is pale, unusually quiet, difficult to console and has purple-red spots that do not fade when pressed. The parent reports fever.

Reasoning: a toxic appearance plus a non-blanching rash is an immediate escalation pattern. Avoid delays for a complete routine examination; begin emergency assessment and infection precautions.

Common errors and how to prevent them

Error	Why it is unsafe	Better practice
Starting with a long history before looking at the patient	Life threats may be visible and time-critical.	Take a deliberate first look, address immediate threats, then ask focused questions.
Calling a patient “intoxicated”	Can hide stroke, hypoglycaemia, trauma, sepsis or poisoning.	Describe speech, smell, pupils, gait and response; check glucose and history.
Using only facial skin to judge colour	Lighting and skin tone can mask cyanosis, pallor or jaundice.	Inspect lips, tongue, conjunctivae, palms, soles and nail beds; correlate with physiology.
Forcing a breathless patient to lie flat	May worsen ventilation and distress.	Allow the position of comfort unless a procedure or resuscitation requires another position.
Repeatedly stimulating an unresponsive patient	Can cause injury and delays; it does not replace airway management.	Use an appropriate response check, call for help and proceed with emergency protocol.
Not asking the baseline	Chronic disability or dementia may be mistaken for new deterioration, or vice versa.	Ask a reliable witness when possible and document who provided the baseline.
Writing “normal” without details	Others cannot compare the patient during handover or reassessment.	Use a fixed sequence and record objective descriptors, time and trend.

Documentation template

A useful appearance note is brief but specific. It should allow the next clinician to picture the patient without seeing them.

Element	Document
Time and position	Time first seen; sitting, supine, lateral, tripod, walking or found on floor.
Overall impression	Comfortable or distressed, interaction, apparent severity and the objective signs supporting that impression.
Skin	Colour compared with baseline, warmth/coolness, moisture, rash, wounds, bleeding, mottling, oedema and perfusion clues.
Head/face	Scalp wounds, skull deformity, facial symmetry, swelling, oral secretions, airway/voice clues and scleral colour.
Response	AVPU/ACVPU or GCS when trained; exact response to voice/command; orientation and change from baseline.
Trend and action	What changed, when it changed, intervention given, response to intervention and who was notified.

Example of a complete handover

“This is a 42-year-old woman found sitting upright at 16:05. She is alert but anxious, speaks in two-word phrases and is using accessory muscles. Lips appear grey compared with her baseline, skin is cool and clammy, and there is facial swelling with hives. She has a hoarse voice but is protecting her airway. No visible trauma. ACVPU A, glucose 5.6 mmol/L. Airway/breathing concern and possible anaphylaxis; anaphylaxis protocol initiated at 16:07, senior help requested, and response is being reassessed continuously.”

General appearance checklist for practical skills

Scene safe, PPE used and patient privacy maintained.
First look completed before lengthy questioning.
Posture, movement, breathing effort and obvious bleeding noted.
Interaction, speech, behaviour and baseline checked.
Skin colour, moisture, temperature, integrity and rash assessed.
Central cyanosis and skin-tone appropriate sites inspected.
Sclerae/oral mucosa assessed for jaundice when indicated.
Scalp, skull, face, mouth and airway clues inspected after trauma or when relevant.
AVPU/ACVPU recorded and trend monitored.
Red flags escalated; ABCDE, vital signs and glucose not delayed.
Objective findings, time, baseline and response to treatment documented.

Self-assessment and revision questions

Define general appearance and explain why it is a screening assessment rather than a diagnosis.
List six observations that can be made during the first 10-second look.
Why should “looks bad” be replaced by objective descriptors?
Give four possible causes of pallor in an emergency patient.
Where can cyanosis be easier to see in a patient with dark skin?
Differentiate central from peripheral cyanosis using appearance findings.
Why should pulse oximetry and respiratory assessment accompany visual colour assessment?
Describe a safe method for inspecting jaundice.
List four red flags that make jaundice an emergency presentation.
What scalp findings may suggest significant trauma?
How can facial asymmetry suggest a stroke, and what time information is essential?
Explain the difference between level of consciousness and level of response.
What does each letter in AVPU mean?
Why is an alert patient not automatically a low-risk patient?
List three causes of sudden agitation in an emergency patient.
Why must an EMT avoid anchoring on alcohol intoxication?
How can a child's appearance signal severe illness before a blood pressure measurement?
What baseline questions are useful for a patient with dementia or disability?
Write an objective appearance note for a pale, sweaty patient with abdominal pain.
Which appearance findings require immediate escalation rather than completion of a routine examination?

Key takeaways

General appearance is the EMT's first clinical filter: observe, describe, act and reassess.
Skin colour, moisture, temperature, rash and integrity can reveal hypoxia, shock, infection, allergy, trauma or metabolic disease.
Use the sclerae, tongue, lips, mucosa, palms, soles and nail beds—not only facial skin—to assess colour changes.
Jaundice, facial asymmetry, airway swelling, scalp trauma and altered response are clues that need context and escalation when accompanied by physiological danger.
Never assume intoxication, “normal ageing,” anxiety or disability explains a new change until life-threatening causes have been assessed.
Record exact observations, the patient's baseline, the time and the response to treatment.

References and further study

Clinical note: This learning page supports EMT study and structured observation. Follow your training, Uganda Ministry of Health/health-facility protocols, scope of practice and senior clinical direction for patient care.

General Appearance in Emergency Physical Examination Read More »

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Respiratory Medicines: Bronchodilators, Steroids, Oxygen and Emergency Care

Respiratory Medicines: Bronchodilators, Steroids, Oxygen and Emergency Care

Learning outcomes

1. Respiratory physiology and medicine targets

2. Practical classification of respiratory medicines

3. Inhaler devices and administration technique

4. β2-agonist bronchodilators

4.1 β2-agonist toxicity

5. Antimuscarinic bronchodilators

6. Inhaled and systemic corticosteroids

7. Acute asthma exacerbation

7.1 EMT sequence

8. COPD exacerbation

8.1 Oxygen targets and hypercapnia

9. Magnesium and second-line bronchodilation

10. Aminophylline and theophylline

11. Anaphylaxis and airway-threatening allergy

12. Pulmonary oedema and cardiac breathlessness

13. Respiratory infection medicines

14. Cough, mucus and upper-airway medicines

15. Oxygen and ventilatory support as medicines

16. Monitoring respiratory medicines

17. Interactions and special populations

18. Clinical scenarios

19. Documentation and handover

20. Revision questions

21. Key takeaways

22. Recommended references for further study

Complete Respiratory Pharmacology Tables

Bronchodilators and anti-inflammatory controllers

Systemic medicines, oxygen and adjuncts

Acute severe asthma: sequence of care

Inhaler and nebulizer nursing checklist

Special cautions and nursing diagnoses

Nervous System Medicines: Classes, Emergency Uses and Safety

Nervous System Medicines: Classes, Emergency Uses and Safety

Learning outcomes

1. Nervous-system physiology and medicine targets

2. Practical classification of nervous-system medicines

3. General principles of nervous pharmacology

4. Analgesics and antipyretics

4.1 Paracetamol/acetaminophen

4.2 Non-steroidal anti-inflammatory drugs (NSAIDs)

4.3 Opioid analgesics

5. Sedatives, benzodiazepines and procedural medicines

5.1 Benzodiazepines

5.2 Ketamine and propofol

6. Local anaesthetics and local-anaesthetic systemic toxicity

7. Antiseizure medicines

8. Convulsive seizures and status epilepticus

8.1 First five minutes: safety and ABCDE

8.2 Time-based medicine sequence

9. Stroke and cerebrovascular emergency medicines

9.1 Stroke assessment checklist

10. Raised intracranial pressure and cerebral oedema

11. Opioid toxicity and naloxone

12. Flumazenil and mixed sedative overdose

13. Acute agitation, psychosis and behavioural emergencies

13.1 Neuroleptic malignant syndrome (NMS)

14. Antidepressants and serotonin safety

14.1 Serotonin syndrome

15. Antipsychotics and mood stabilisers

15.1 Lithium toxicity

16. Parkinson medicines

17. Migraine and severe headache medicines

18. High-risk interactions and special populations

19. Medication administration and monitoring checklist

20. Clinical scenarios

21. Calculations and dose safety

22. Documentation and structured handover

23. Revision questions

24. Key takeaways

25. Recommended references for further study

Complete Nervous System Pharmacology Tables

Analgesics, Antipyretics and Opioid Reversal

Antiseizure Medicines and Status Epilepticus

Psychiatric and Sedative Medicines

Parkinsonism, Migraine and Neuromuscular Medicines

Nervous System Medicine Nursing Care Plan