Which statement is true regarding metronidazole and alcohol interaction?

• A. Do not consume alcohol while taking metronidazole.
• B. Alcohol has no interaction with metronidazole.
• C. Alcohol improves the antibiotic effect of metronidazole.
• D. Moderate alcohol intake is safe with metronidazole.

Answer: (A)

Metronidazole can cause a disulfiram-like reaction when alcohol is consumed. This happens because the drug can interfere with the body's ability to metabolize acetaldehyde, leading to a rapid buildup of acetaldehyde after drinking. The result is unpleasant symptoms such as flushing, tachycardia, nausea and vomiting, headache, and lightheadedness. Because of this, the safe and correct approach is to avoid alcohol during the entire course of metronidazole therapy and for at least 24 to 48 hours after finishing the medication. There isn’t any beneficial effect from mixing alcohol with metronidazole, and moderate alcohol intake is not considered safe due to the risk of the reaction.