Delirium Tremens (DTs): Emergency Management

Overview

Timing & Risk Factors

Clinical Features (Symptoms)

• Confusion, disorientation, fluctuating consciousness
• Vivid hallucinations - tactile ("bugs crawling on skin") are most characteristic; visual also common
• Delusions, paranoia
• Psychomotor agitation (ranging from lethargy to severe agitation)
• Marked inattention, incoherent speech

• Tachycardia
• Hypertension
• Fever (sometimes severe hyperthermia)
• Diaphoresis (profuse sweating)
• Dilated pupils (mydriasis)
• Insomnia, anxiety
• Kaplan & Sadock's Synopsis of Psychiatry, Table 4-6

CIWA-Ar Scoring (Severity Assessment)

• Score 8-14: Moderate withdrawal - repeat benzodiazepine every 2 hours until score <8
• Score >15: Severe withdrawal - repeat benzodiazepine every hour until score <15
• Limitation: 7 of 10 components require patient communication, so language barriers, sedation, or concurrent illness can make accurate scoring difficult.
• Tintinalli's Emergency Medicine, p. 1266; Maudsley Prescribing Guidelines, 15th ed.

Emergency Treatment: Step-by-Step

1. Immediate Stabilization

• Secure IV access, cardiac monitoring, pulse oximetry
• Check glucose immediately (correct hypoglycemia)
• Assess airway - aspiration risk is high in agitated patients
• Prepare for intubation if refractory to pharmacotherapy

2. Benzodiazepines (First-Line)

• Symptom-triggered therapy (guided by CIWA-Ar) uses less total drug and has shorter treatment duration than fixed-schedule dosing - this is the recommended approach.
• IV diazepam: fastest onset (1-5 min), long half-life provides self-tapering effect.
• IM lorazepam or IM midazolam: acceptable if IV access unavailable.
• IM diazepam: avoid (erratic absorption).
• Tintinalli's Emergency Medicine, p. 1266

3. Refractory DTs (Benzodiazepine-Resistant)

• Recent evidence (PMID 37060631, 37589203) supports phenobarbital as an effective and increasingly used adjunct or alternative in the emergency department, with systematic review data demonstrating reduced ICU admission and benzodiazepine use.
• Systematic review data (PMID 39415533) supports propofol as a rescue agent in refractory cases requiring ICU/intubation.
• Tintinalli's Emergency Medicine, p. 1267

4. Adjunctive & Supportive Care

5. Antipsychotics

• Haloperidol or other antipsychotics can be used as adjuncts for hallucinations/agitation but do not replace benzodiazepines and do not prevent seizures.
• Phenytoin is not recommended for alcohol withdrawal seizures - it may actually lower the seizure threshold.

6. Disposition

• All patients with DTs require ICU admission for continuous monitoring, airway management, and titrated sedation.
• Inpatient detoxification is mandatory if there is a history of DTs or withdrawal seizures. - Maudsley Prescribing Guidelines, 15th ed.

Differential Diagnosis

• Septic encephalopathy / meningitis / encephalitis
• Wernicke's encephalopathy (thiamine deficiency - give thiamine empirically to all)
• Hypoglycemia
• Anticholinergic toxidrome
• Sympathomimetic toxidrome
• Benzodiazepine or barbiturate withdrawal (clinically identical to DTs)
• Hepatic encephalopathy

Summary Algorithm

Suspected DTs
    ↓
Secure IV access → Glucose check → O2/monitor
    ↓
Thiamine 100 mg IV FIRST (before any dextrose)
    ↓
Benzodiazepine (lorazepam 2-4 mg IV or diazepam 10-20 mg IV)
    ↓ Double dose every 5-20 min until light somnolence
    ↓
Still agitated after 50-100 mg diazepam equivalent?
    ↓ YES
Phenobarbital 65 mg IV q15-30 min (max 260 mg)
  OR Propofol infusion + INTUBATION
  OR Dexmedetomidine adjunct
    ↓
ICU admission + Supportive care
(fluids, electrolytes, cooling, aspiration prevention)

Recent Evidence Updates

• Phenobarbital meta-analysis (2023) - PMID 37060631: Phenobarbital-based approach is effective and associated with lower ICU admission rates vs. benzodiazepine-only protocols.
• SAEM GRACE systematic review (2024) - PMID 37589203: Direct evidence supports phenobarbital in the emergency department for alcohol withdrawal management.
• Propofol systematic review (2025) - PMID 39415533: Propofol is a viable rescue agent in refractory alcohol withdrawal requiring ICU-level care.