Delirium Tremens

Delirium Tremens

Delirium tremens (DT) is the severe form of alcohol-withdrawal syndrome characterized by acute fluctuating disturbance of attention and awareness, marked autonomic overactivity and usually agitation, tremor, perceptual disturbance and disorientation after a dependent person abruptly stops or greatly reduces alcohol.

Clinical importance and timing

Withdrawal symptoms may begin within hours of falling alcohol levels. Withdrawal seizures commonly occur earlier, while delirium tremens often develops about 48–96 hours after cessation, although onset varies and may be later. The syndrome can worsen rapidly through dehydration, hyperthermia, arrhythmia, aspiration, injury, electrolyte disturbance or respiratory depression from treatment.

Pathophysiology

Chronic alcohol exposure enhances inhibitory gamma-aminobutyric acid (GABA) effects and suppresses excitatory glutamate activity. The brain adapts by reducing inhibition and increasing excitation. When alcohol is suddenly removed, these adaptations remain temporarily unopposed, producing central nervous-system hyperexcitability:

1. Reduced GABA-mediated inhibition causes anxiety, tremor, insomnia and seizures.
2. Excess glutamatergic activity causes agitation, confusion and autonomic instability.
3. Adrenergic overactivity produces sweating, tachycardia, hypertension and fever.
4. Malnutrition, thiamine deficiency, liver disease, infection and electrolyte disturbance increase complications and may mimic or worsen delirium.

Risk factors for severe withdrawal

• Previous delirium tremens or alcohol-withdrawal seizures.
• Long duration of heavy daily drinking, high tolerance or repeated withdrawals (“kindling”).
• Concurrent infection, trauma, pancreatitis, liver disease or serious medical illness.
• Older age, dehydration, malnutrition or electrolyte disturbance.
• Recent sedative-hypnotic use or withdrawal.
• Marked withdrawal signs while blood alcohol may still be present.
• Lack of reliable monitoring/support or delayed presentation.

Clinical manifestations

Differential diagnosis

• Delirium from another cause: Malaria or other infection, sepsis, meningitis, hypoxia, organ failure, electrolyte disturbance or medicines.
• Wernicke encephalopathy: Confusion, gait/coordination abnormality and eye signs may be incomplete; treat suspected disease urgently with parenteral thiamine.
• Hepatic encephalopathy: Liver disease, asterixis and metabolic features; benzodiazepines may worsen consciousness.
• Head injury or intracranial disease: Trauma, focal neurological signs, persistent reduced consciousness.
• Hypoglycaemia: Check immediately; it is rapidly reversible and dangerous.
• Primary psychosis: Usually preserves orientation and attention better and lacks marked withdrawal autonomic signs.
• Other intoxication/withdrawal: Stimulants, sedatives, opioids or anticholinergic toxicity.

Emergency assessment

1. Call for medical/emergency help. Manage in a setting capable of frequent observations and airway support.
2. ABCDE: Assess airway, respiratory rate/oxygen saturation, circulation, temperature, consciousness and exposure for trauma, infection or bleeding.
3. Check bedside glucose. Treat hypoglycaemia immediately while giving thiamine as soon as possible; do not dangerously delay glucose in a hypoglycaemic patient.
4. Establish history. Last drink, usual quantity, previous withdrawal/seizures, medicines, other substances, illness, injury and pregnancy.
5. Assess severity repeatedly. Use the facility’s withdrawal scale only when the patient can participate; severe delirium may require an objective protocol rather than reliance on self-report.
6. Investigate causes/complications. As indicated: full blood count, glucose, electrolytes including magnesium, renal/liver tests, infection studies, ECG and imaging for injury/focal signs.

Management goals

• Control agitation and withdrawal while maintaining breathing and circulation.
• Prevent recurrent seizures, aspiration, injury and hyperthermia.
• Correct glucose, fluids, electrolytes and vitamin deficiency.
• Identify and treat infection, trauma, liver disease and other precipitating illness.
• Provide continuous nursing care, then link the patient to ongoing alcohol-use treatment.

Pharmacological management

Benzodiazepines: first-line treatment

WHO recommends benzodiazepines for alcohol-withdrawal delirium. Uganda Clinical Guidelines 2023 describe diazepam 5–10 mg every 10 minutes until appropriate sedation, noting that high doses may be required and respiration must be monitored. This is a clinician-directed hospital regimen; the target is a calm, rousable patient—not coma.

Supportive and cause-directed care

• Fluids: Assess dehydration and replace oral/IV fluids carefully according to clinical status, renal/cardiac function and electrolytes.
• Electrolytes: Correct potassium, magnesium, sodium and phosphate abnormalities according to results and protocol; monitor ECG when indicated.
• Nutrition: After stabilization, provide energy, protein and vitamins; assess swallowing and aspiration risk.
• Temperature: Identify infection and manage hyperthermia; do not assume fever is withdrawal alone.
• Comorbid illness: Treat pneumonia, pancreatitis, injury, gastrointestinal bleeding, liver disease or other causes concurrently.
• Seizures: Protect from injury, maintain airway, time the event and follow acute-seizure protocol. Benzodiazepines also prevent recurrent withdrawal seizures.

Detailed nursing management

1. Place in a calm, well-observed area. Reduce excessive noise and shadows, but maintain adequate orientation cues such as clock, daylight and familiar staff.
   Overstimulation worsens fear; total darkness and sensory deprivation can worsen misperception.
2. Maintain continuous safety. Use a low bed, clear hazards, assist mobility and maintain an exit route. Avoid physical confrontation and use restraint only as a last resort under policy.
3. Monitor frequently. Record pulse, BP, respiratory rate, oxygen saturation, temperature, consciousness, agitation, tremor, hallucinations, fluid balance and response after every sedative dose.
4. Protect breathing. Position to maintain airway, have oxygen and suction ready, and escalate snoring, slow breathing, falling saturation or reduced responsiveness.
5. Administer medicines safely. Verify cumulative benzodiazepine dose, route and time; do not repeat automatically without reassessment.
6. Reorient and reassure. Introduce yourself repeatedly, use short sentences, explain procedures and respond to fear: “I understand you see insects; I cannot see them, but you are safe and I will stay with you.”
7. Manage intake/output. Measure fluids, vomiting and urine; monitor laboratory results and signs of overload or ongoing dehydration.
8. Prevent aspiration and injury. Assess swallowing, supervise oral intake, use seizure precautions and inspect for injuries after agitation or convulsions.
9. Preserve dignity. Provide hygiene, continence care, clean clothing and privacy; never mock hallucinations or label the person as deliberately difficult.
10. Document and hand over. Include last alcohol use, cumulative medicine doses, response, respiratory observations, seizures, investigations, fluids and unresolved risks.

Complications

• Withdrawal seizures and status epilepticus.
• Aspiration pneumonia, hypoxia and respiratory arrest.
• Cardiac arrhythmia, severe hypertension or cardiovascular collapse.
• Dehydration, acute kidney injury and electrolyte abnormalities.
• Hyperthermia and rhabdomyolysis.
• Traumatic injury, falls and pressure damage.
• Wernicke encephalopathy progressing to persistent Korsakoff syndrome.
• Over-sedation and respiratory depression from treatment.

Evaluation and step-down care

Improvement is shown by restored attention/orientation, settling autonomic signs, absence of seizures, reduced tremor/agitation, adequate sleep and intake, and stable physical observations without excessive sedation. Continue reassessment because sedative accumulation and comorbid illness may become apparent as agitation settles.

After withdrawal: relapse prevention

• Use a non-judgmental assessment of alcohol dependence, harms and readiness to change.
• Explain that abrupt unsupervised cessation after severe dependence can be dangerous.
• Offer brief intervention, specialist substance-use referral, psychological treatment and peer/family support.
• Develop a relapse and crisis plan; address housing, violence, depression and suicide risk.
• Do not routinely discharge the patient with benzodiazepines; follow prescribed taper and policy.
• Arrange physical-health and nutrition follow-up, including liver disease and vitamin needs.

Revision questions

1. Define delirium tremens and explain its pathophysiology.
2. Differentiate delirium tremens from primary psychosis and hepatic encephalopathy.
3. Describe emergency management including verified medicine doses and monitoring.
4. Explain why antipsychotics must not be used alone.
5. Develop five prioritized nursing diagnoses with outcomes and interventions.

References

• Uganda Ministry of Health. Uganda Clinical Guidelines 2023.
• WHO: Treatment of alcohol-withdrawal delirium.
• WHO: Management of alcohol withdrawal.