## Alcohol Withdrawal Syndrome: Timeline and Clinical Progression **Key Point:** Alcohol withdrawal follows a predictable temporal sequence, with tremor and autonomic hyperactivity appearing first, typically 6–24 hours after the last drink. ### Timeline of Withdrawal Manifestations | Timeframe | Clinical Feature | Severity | |-----------|------------------|----------| | 6–24 hours | Tremor, diaphoresis, tachycardia, anxiety | Mild | | 12–48 hours | Hallucinosis (visual/tactile) | Moderate | | 12–48 hours | Withdrawal seizures (generalized tonic-clonic) | Severe | | 48–96 hours | Delirium tremens (confusion, autonomic storm) | Most severe | **High-Yield:** The **earliest sign** is always **tremor with autonomic hyperactivity** (tachycardia, hypertension, diaphoresis, anxiety). This is the hallmark of simple alcohol withdrawal and appears within hours of cessation. **Clinical Pearl:** Seizures and delirium tremens are *late* and *severe* manifestations, not early signs. A patient with tremor alone is in early withdrawal; one with seizures or delirium is in complicated withdrawal and requires urgent intervention. **Warning:** Do not confuse the *earliest* sign with the *most severe* sign. Delirium tremens is the most dangerous form but occurs last in the sequence. ### Mechanism Alcohol is a CNS depressant (GABA~A~ agonist). Chronic use leads to downregulation of GABA receptors and upregulation of glutamate (excitatory). Upon cessation, loss of GABA inhibition and unopposed glutamate activity cause hyperexcitability, manifesting first as tremor and autonomic activation.
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