A 48-year-old man admitted for alcohol withdrawal syndrome is started on benzodiazepines and thiamine. On day 2 of hospitalization, he develops generalized tonic-clonic seizures. Which feature best distinguishes alcohol withdrawal seizures from seizures due to other causes in this patient?

Explanation

## Alcohol Withdrawal Seizures: Distinguishing Features ### Temporal and Clinical Characteristics | Feature | Alcohol Withdrawal Seizures | Other Seizure Causes | |---------|----------------------------|---------------------| | **Timing** | 6–48 hours after last drink (peak: 12–24 hours) | Variable; not temporally linked to alcohol cessation | | **Number** | Multiple seizures (50–60% have >1 seizure) | Single or recurrent depending on etiology | | **Duration** | Brief (seconds to 1–2 minutes) | Variable; may be prolonged | | **Type** | Generalized tonic-clonic (most common) | Focal or generalized depending on cause | | **EEG findings** | Generalized spike-wave activity | Depends on seizure type and etiology | | **Preceding aura** | Absent | May be present (focal seizures, temporal lobe epilepsy) | | **Status epilepticus** | Rare (5–15% of cases) | More common in some etiologies (e.g., idiopathic epilepsy, CNS infection) | **Key Point:** Alcohol withdrawal seizures are characterized by their **temporal relationship to alcohol cessation (6–48 hours)**, **multiplicity**, and **brief generalized tonic-clonic nature**. They occur during the period of maximum CNS hyperexcitability. **High-Yield:** Withdrawal seizures are: - **Multiple** (50–60% of patients have more than one seizure) - **Brief** (typically <1 minute) - **Generalized** (not focal) - **Temporally clustered** (within 6–48 hours of last drink) **Mnemonic: WAWS** — **W**ithdrawal, **A**cute (6–48 hrs), **W**ide-spread (generalized), **S**hort duration **Clinical Pearl:** The presence of withdrawal seizures is a medical emergency and indicates risk for progression to delirium tremens. Benzodiazepines are both therapeutic and prophylactic; they treat acute seizures and prevent further seizures during the withdrawal period. **Warning:** Do not assume all seizures in an alcoholic are withdrawal seizures. Always rule out other causes: head trauma, hypoglycemia, hepatic encephalopathy, infection (meningitis, encephalitis), and idiopathic epilepsy.