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 148/92 mmHg. He denies hallucinations or seizures. What is the most appropriate immediate next step in management?

Explanation

## Clinical Context This patient presents with **early alcohol withdrawal syndrome** (tremor, autonomic hyperactivity, agitation) without seizures or hallucinations. The timeline (18 hours post-cessation) and vital signs are classic for uncomplicated withdrawal. ## Management of Alcohol Withdrawal **Key Point:** Benzodiazepines are the first-line pharmacological treatment for alcohol withdrawal. They reduce seizure risk, prevent progression to delirium tremens, and manage autonomic symptoms. **High-Yield:** The CIWA-Ar (Clinical Institute Withdrawal Assessment for Alcohol scale) guides dosing; scores ≥8–10 warrant benzodiazepine administration. This patient's tremor, tachycardia, and agitation indicate active withdrawal requiring immediate benzodiazepine therapy. ### Benzodiazepine Dosing Protocol | Parameter | Details | |-----------|----------| | **First-line agent** | Lorazepam (short half-life, no active metabolites, safe in liver disease) or diazepam (longer acting, preferred if seizure risk high) | | **Lorazepam dosing** | 2 mg IV/IM every 5–10 min until signs subside; then 1–2 mg every 4–6 hours | | **Titration goal** | Calm, oriented patient; HR <100; no tremor | | **Supportive care** | Thiamine 100 mg IV/IM daily × 3 days (prevent Wernicke encephalopathy); folate, magnesium, glucose monitoring | **Clinical Pearl:** Lorazepam is preferred in severe liver disease or renal impairment because it undergoes glucuronidation (not hepatic oxidation) and has no active metabolites. ## Why Other Options Are Incorrect **Disulfiram** (option 2) is a relapse-prevention agent used AFTER detoxification is complete and the patient is abstinent for at least 24 hours. It is contraindicated during acute withdrawal. **Lumbar puncture** (option 3) is unnecessary. Meningitis would present with nuchal rigidity, photophobia, and fever — absent here. Withdrawal alone does not warrant LP. **Naltrexone** (option 4) is an opioid antagonist used for alcohol use disorder maintenance (reduces craving) but has no role in acute withdrawal management. [cite:Harrison 21e Ch 422]