Alcohol and Metronidazole: Drug Interaction Guide
Quick answer: This is a major interaction — avoid combining Alcohol and Metronidazole unless specifically directed by your doctor.
How Alcohol interacts with Metronidazole
Metronidazole inhibits aldehyde dehydrogenase, allowing acetaldehyde to accumulate after ethanol ingestion and producing a disulfiram-like reaction (flushing, vomiting, tachycardia).
What you should do
Counsel patients to abstain from all alcohol-containing products, including mouthwashes and oral solutions, during therapy and for 48 hours after the last metronidazole dose.
Key facts
Severity
Major — avoid combination
Mechanism
Metronidazole inhibits aldehyde dehydrogenase, allowing acetaldehyde to accumulate after ethanol ingestion and producing...
Action
Counsel patients to abstain from all alcohol-containing products, including mouthwashes and oral solutions, during thera...
Frequently asked questions
Can I take Alcohol and Metronidazole together?
No — this combination should generally be avoided. Counsel patients to abstain from all alcohol-containing products, including mouthwashes and oral solutions, during therapy and for 48 hours after the last metronidazole dose.
What is the severity of this interaction?
The interaction between Alcohol and Metronidazole is classified as Major — avoid combination. Metronidazole inhibits aldehyde dehydrogenase, allowing acetaldehyde to accumulate after ethanol ingestion and producing a disulfiram-like reaction (flushing, vomiting, tachycardia).
What should I do if I'm prescribed both?
Counsel patients to abstain from all alcohol-containing products, including mouthwashes and oral solutions, during therapy and for 48 hours after the last metronidazole dose. Always consult your prescribing clinician — do not stop or change medications without medical guidance.
Last reviewed: by iMedic Medical Editorial Team. Our editorial process.