Can You Drink Alcohol 24 Hours After Taking Metronidazole?
Medically reviewed by Faith Coleman, University of New Mexico School of Medicine on August 21st, 2026.
No, you should not drink alcohol 24 hours after taking metronidazole. The antibiotic remains active in your system for up to 72 hours after your last dose, continuing to block the enzyme aldehyde dehydrogenase. This action, when combined with alcohol, can cause potentially dangerous reactions including severe nausea, vomiting, flushing, rapid heartbeat, and headaches. Clinical studies show these reactions can occur even with small amounts of alcohol consumed within 72 hours of metronidazole. It is recommended that you wait at least 72 hours after your last dose of metronidazole before consuming any alcoholic beverages, to ensure that the medication has cleared from your body.
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