Alcohol withdrawal typically begins within how many hours after cessation or reduction?

• A. 1-2 hours
• B. 4-12 hours
• C. 24-48 hours
• D. 72 hours

Answer: (B)

The timing concept being tested is when alcohol withdrawal signs first appear after stopping drinking. Chronic alcohol use enhances GABAergic inhibition and dampens excitatory activity; when alcohol is suddenly removed, the brain shifts toward a hyperexcitable state. This change typically becomes clinically evident within a few hours, most commonly 4 to 12 hours after cessation. Early autonomic signs and tremors can appear during this window as the body adjusts. Earlier onset, such as within 1–2 hours, is less typical for withdrawal and more reflective of ongoing intoxication or immediate effects. Signs that emerge later, like more severe autonomic instability, seizures, or delirium tremens, usually occur after 24–48 hours or around 48–72 hours, representing progression rather than the initial onset. Therefore, 4–12 hours is the best answer because it aligns with the expected onset of withdrawal symptoms following cessation.