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When can I drink alcohol after finishing metronidazole?

Metronidazole is an antibiotic that's used to treat certain types of bacterial and parasitic infections.

It's known to react badly with alcohol and may cause a number of unpleasant side effects, including:

It's not clear why metronidazole and alcohol affect each other, and it's impossible to be sure exactly how long the problem might last after stopping metronidazole. This is because there has been very little research into this.

However, the advice given by one of the manufacturers of metronidazole is that you should avoid drinking alcohol while taking it and for 48 hours after finishing the course.

During this time, it may be sensible to also avoid cough and cold remedies and mouthwashes that contain alcohol. 

Speak to your GP or pharmacist if you are unsure.

Further information:

Page last reviewed: 08/05/2015

Next review due: 07/05/2017