Phenobarbital for alcohol withdrawal: widely used, with little agreement on how

Design

Multiple-methods survey and focus-group study

Population

33 hospitalists from 27 US tertiary hospitals

Primary outcome

Reported alcohol withdrawal treatment practices and themes

Effect

Phenobarbital used in 67% of emergency departments and 44% of medical wards

This mixed-methods study surveyed 33 hospitalists from 27 US tertiary hospitals and ran seven focus groups. Benzodiazepines remained the most common treatment for moderate to severe alcohol withdrawal, but phenobarbital was reported in use in 67% of emergency departments and 44% of medical wards.

Participants described a lack of consensus, with drug choice often driven by drug shortages, nursing workload and length of stay rather than evidence, and patients rarely involved in the choice.

This is a small qualitative study and measures practice, not outcomes. Its value is in naming the variation. Phenobarbital has a long half-life and a narrow margin when combined with benzodiazepines, so a ward without a protocol for it carries risk.

• Check whether your hospital has a written protocol before using phenobarbital for withdrawal.
• Avoid stacking phenobarbital on large benzodiazepine doses without monitoring for respiratory depression.
• Remember phenobarbital's long half-life when planning discharge or transfer.
• Benzodiazepines remain the standard treatment with the deepest evidence base.

Why it matters

Practice is changing faster than the evidence, and variation between wards is a safety risk.

Don't overread it

This is a survey and focus-group study of 33 clinicians; it says nothing about whether phenobarbital is safer or more effective.

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