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Alcohol Withdrawal: Timeline, CIWA, and Delirium Tremens

Mental health · Written by Professor Foxx, RN, MSN · Updated October 2026

Alcohol withdrawal can be deadly. Knowing the timeline helps you catch problems before they turn into seizures or delirium tremens.

Timeline after the last drink

TimeWhat you may see
6 to 24 hoursTremors, anxiety, sweating, nausea, fast heart rate, trouble sleeping
12 to 48 hoursWithdrawal seizures; some clients have hallucinations
48 to 72 hoursDelirium tremens (DTs): severe confusion, hallucinations, fever, very fast heart rate, high BP. A medical emergency

CIWA

The CIWA-Ar scale scores symptoms like tremor, sweating, anxiety, agitation, and hallucinations. Higher scores mean more severe withdrawal and guide how much benzodiazepine (like lorazepam or chlordiazepoxide) the client receives.

Nursing care

A client admitted 2 days ago is now confused, seeing bugs on the wall, with a heart rate of 128 and a temperature of 38.6 °C. What does the nurse suspect?

Show answer

Delirium tremens. Notify the provider right away, treat per CIWA or orders, keep the client safe, and start seizure precautions.

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Quick answers

When does delirium tremens start?

Usually about 48 to 72 hours after the last drink. It causes severe confusion, hallucinations, fever, and unstable vital signs.

Why give thiamine before glucose in alcohol withdrawal?

Glucose given first can use up the remaining thiamine and trigger Wernicke encephalopathy.

Evidence & Clinical Sources

Reviewed against current guidelines and drug labels. Always follow your program, a current drug reference, and facility policy. Our sources policy

For learning only. Lab ranges and policies vary. Always follow your nursing program, a current drug reference, and your facility's policies.

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