Alcohol Withdrawal Delirium, commonly known as Delirium Tremens (DTs), is a severe and life-threatening complication of alcohol withdrawal occurring after sudden reduction or cessation of prolonged heavy alcohol consumption. It represents the most serious manifestation of Alcohol Withdrawal Syndrome.

Symptoms typically begin 48–72 hours after cessation of alcohol intake, peak around day 4–5, and may persist for several days. Early withdrawal symptoms such as tremors, anxiety, insomnia, and autonomic instability may start as early as 6–12 hours after the last drink.

Delirium Tremens carries significant mortality if untreated due to cardiovascular collapse, electrolyte imbalance, infection, or complications such as seizures.

Epidemiology

• Delirium Tremens occurs in a minority of individuals with Alcohol Use Disorder but carries significant morbidity and mortality if untreated

• It is more common among individuals with severe alcohol dependence and previous episodes of complicated withdrawal

• Early recognition and treatment significantly reduce complications and mortality

Risk Factors

• Long-term heavy alcohol consumption

• Previous history of Delirium Tremens

• Previous alcohol withdrawal seizures

• Abrupt cessation of alcohol intake

• High level of alcohol dependence

• Advanced age

• Malnutrition

• Electrolyte abnormalities

• Coexisting medical illness

• Delayed treatment of alcohol withdrawal

Pathophysiology

Chronic alcohol exposure enhances inhibitory GABA activity and suppresses excitatory glutamate activity in the central nervous system. The brain compensates by reducing GABA sensitivity and increasing excitatory neurotransmission. When alcohol is suddenly withdrawn, excessive neuronal excitation occurs, resulting in autonomic hyperactivity, agitation, hallucinations, seizures, and delirium.

Clinical Presentation

Symptoms usually develop 2–3 days after stopping alcohol intake, reaching peak severity around 5 days after cessation. Some withdrawal symptoms such as tremors may begin within 12 hours.

Diagnostic Features

• Visual hallucinations

• Disorientation

• Fluctuating level of consciousness

• Agitation

• Tachycardia

• Hypertension

• Low-grade fever

Associated Features

• Severe anxiety

• Sweating

• Tremors

• Insomnia

• Confusion

• Poor attention

• Withdrawal tonic-clonic seizures, commonly occurring 24–48 hours after cessation of alcohol intake

Diagnostic Criteria

Diagnosis is clinical and requires:

• Recent cessation or reduction of prolonged heavy alcohol use

• Acute disturbance in attention, awareness, and cognition

• Evidence of alcohol withdrawal symptoms

• Development of delirium symptoms during withdrawal

Features may include:

• Visual hallucinations

• Disorientation

• Fluctuating consciousness

• Agitation

• Autonomic hyperactivity including tachycardia and hypertension

• Low-grade fever

• Withdrawal seizures

Alternative causes of delirium should always be considered, especially in atypical presentations.

Differential Diagnosis

• Sepsis-related delirium

• Head injury

• Hypoglycaemia

• Electrolyte disturbances

• Drug intoxication or withdrawal

• Hepatic encephalopathy

• Wernicke encephalopathy

• Meningitis or encephalitis

• Stroke

• Epilepsy

Investigations

Investigations are required to identify complications and alternative causes of delirium.

Laboratory Investigations

• Blood glucose

• Full blood count

• Serum electrolytes

• Renal function tests

• Liver function tests

• Serum magnesium

• Blood alcohol concentration where available

• Blood cultures if infection is suspected

Additional Assessment

• Continuous monitoring of vital signs

• Oxygen saturation monitoring

• Electrocardiogram

• Assessment of hydration status

• Neurological assessment

Emergency Care

Management follows the principles of emergency stabilization.

Airway

• Secure airway and assess risk of aspiration

• Prepare for airway support if consciousness deteriorates

Breathing

• Ensure adequate breathing

• Provide oxygen if required

• Monitor for respiratory depression especially after sedative administration

Circulation

• Establish intravenous access

• Monitor blood pressure and heart rate

• Correct dehydration and circulatory instability

Fluid Management

• Give intravenous fluids such as dextrose normal saline to prevent hypoglycaemia and hypotension where clinically indicated

Management

Treatment Goals

• Control agitation and delirium

• Prevent seizures

• Correct nutritional deficiencies

• Maintain airway, breathing, and circulation

• Prevent complications and death

Non-Pharmacological Management

• Admit patients requiring treatment in a monitored environment

• Provide a calm and safe environment

• Minimize unnecessary stimulation

• Reorient the patient frequently

• Ensure adequate hydration and nutrition

• Monitor vital signs and level of consciousness regularly

• Provide family support and education where appropriate

Pharmacological Management

Sedation and Control of Delirium

Diazepam 10 mg intravenously for immediate sedative or hypnotic action. If there is no response, give a second dose.

Notes:

• Monitor respiratory status and level of consciousness

• Use cautiously in patients with respiratory impairment

• Dose should be adjusted according to clinical response

OR

Lorazepam 2 mg intramuscularly or intravenously for immediate sedative or hypnotic action. If there is no response, give a second dose.

Notes:

• Monitor for excessive sedation and respiratory depression

OR

Chlordiazepoxide 20–60 mg intravenously, tapering gradually over one month according to clinical response.

Vitamin Supplementation

Thiamine 100–300 mg intramuscularly once daily.

OR

Vitamin B Complex 1 ampoule intravenously in 500 ml of 5% dextrose.

Notes:

• Do not administer thiamine at a rate exceeding 5 mg/minute

• Switch to oral supplementation once clinical stabilization and containment are achieved

• Give thiamine before glucose administration where possible in patients at risk of Wernicke encephalopathy

Referral Criteria

Refer to higher-level care if:

• Severe delirium requiring intensive monitoring

• Persistent agitation despite treatment

• Respiratory depression after sedative administration

• Withdrawal seizures

• Reduced level of consciousness

• Cardiovascular instability

• Diagnostic uncertainty

• Severe medical complications

Complications

• Aspiration pneumonia

• Respiratory depression

• Seizures

• Electrolyte disturbances

• Wernicke encephalopathy

• Cardiovascular complications

• Coma

• Death

Prevention

• Identification and treatment of Alcohol Use Disorder

• Medically supervised alcohol detoxification for high-risk individuals

• Adequate nutritional support

• Early recognition of withdrawal symptoms

• Thiamine supplementation in high-risk patients

• Long-term relapse prevention strategies

Prognosis

Delirium Tremens is a medical emergency with significant mortality if untreated. Early recognition, appropriate benzodiazepine therapy, nutritional support, and close monitoring greatly improve outcomes. Recovery is usually achieved within several days when adequately managed.

Patient Education

• Severe alcohol withdrawal can be life-threatening

• Individuals with heavy alcohol dependence should not stop alcohol suddenly without medical advice

• Seek urgent care for confusion, hallucinations, seizures, severe agitation, or reduced consciousness

• Continue follow-up and treatment for Alcohol Use Disorder after recovery

• Avoid relapse through counselling, support groups, and rehabilitation programmes