A 52-year-old man with a 20-year history of alcohol dependence presents to the emergency department with tremors, diaphoresis, tachycardia (HR 110/min), and agitation 18 hours after his last drink. Blood pressure is 160/95 mmHg. He denies hallucinations or seizures. What is the most appropriate immediate next step in management?

Explanation

## Clinical Assessment of Alcohol Withdrawal Severity The patient presents with **early alcohol withdrawal syndrome** (tremor, autonomic hyperactivity without seizures or hallucinations). The Clinical Institute Withdrawal Assessment for Alcohol Scale (CIWA-Ar) would likely score 15–20, indicating **moderate withdrawal** requiring pharmacological intervention. ### Management Algorithm for Alcohol Withdrawal ```mermaid flowchart TD A[Alcohol withdrawal suspected]:::outcome --> B{CIWA-Ar score?}:::decision B -->|< 8: Mild| C[Supportive care + thiamine]:::action B -->|8-15: Moderate| D[Benzodiazepine + thiamine]:::action B -->|> 15: Severe| E[ICU admission + IV benzodiazepine]:::action D --> F[Lorazepam 1-2 mg IV/IM q2-4h PRN]:::action E --> G[Lorazepam 4-5 mg IV q5-10 min until calm]:::action F --> H[Reassess with CIWA-Ar q1h]:::action G --> H H --> I[Taper as symptoms resolve]:::action ``` **Key Point:** **Benzodiazepines are first-line** for moderate-to-severe alcohol withdrawal. Lorazepam is preferred because it has: - Rapid onset (IV: 2–3 minutes) - No active metabolites (safe in hepatic impairment) - Intermediate half-life (12 hours) **High-Yield:** The **CIWA-Ar score** guides dosing: - Mild (< 8): observation + thiamine - Moderate (8–15): benzodiazepine + thiamine - Severe (> 15): ICU-level care + aggressive benzodiazepine dosing This patient's presentation (tremor, tachycardia, hypertension, agitation without seizures/hallucinations) = **moderate withdrawal** → **lorazepam 1–2 mg IV/IM q2–4h PRN**, with reassessment in 5 minutes to titrate further if needed. **Clinical Pearl:** Always co-administer **thiamine 100 mg IV/IM daily** (or PO if tolerating) to prevent Wernicke encephalopathy, especially in malnourished patients. Give thiamine *before* glucose to avoid precipitating Wernicke in thiamine-depleted states. **Warning:** ~~Naltrexone~~ is an opioid antagonist used for **relapse prevention** after withdrawal is managed, not for acute withdrawal. ~~Lumbar puncture~~ is not indicated; no fever, meningeal signs, or focal CNS findings. ~~Observation without benzodiazepines~~ risks progression to seizures (10–15% of untreated moderate withdrawal) and delirium tremens (mortality 5–15% if untreated).