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Is there a drug interaction between Flagyl and alcohol?

Flagyl (generic name metronidazole) is an antibiotic used to treat certain bacterial and parasitic infections. Flagyl should never be taken with alcohol (ethanol), since the two can interact to cause serious side effects, including intense nausea, vomiting, headache, abdominal cramps, flushing, and a racing heartbeat. In some cases, these side effects may even lead to heart or liver damage.

You should not consume alcohol while you are taking Flagyl or for at least three days after you have completed therapy. Avoid products that contain alcohol, such as cough syrups or herbal extracts.

If you drink any alcohol while you’re taking Flagyl, monitor yourself for flushing, nausea, and vomiting. Contact your doctor if these symptoms become serious.

Sources:
Drug Facts and Comparisons. Facts and & Comparisons, 2006.
Hansten, P. D., J. R. Horn. Drug Interactions Analysis and Management. Facts and Comparisons, 2000.
Micromedex® Healthcare Series. Thomson Micromedex, 2006.

This answer prepared 7/2/2001.
This information updated 1/25/2007.