Metronidazole and Tinidazole: Drug Interaction Guide
Quick answer: This combination requires caution. Metronidazole and Tinidazole can be used together with adjustments and monitoring.
How Metronidazole interacts with Tinidazole
Both drugs inhibit aldehyde dehydrogenase; concurrent alcohol exposure causes acetaldehyde accumulation producing a disulfiram-like reaction (flushing, vomiting, tachycardia, headache).
What you should do
Although co-prescription is rare, avoid duplicating nitroimidazoles. Counsel patients to avoid alcohol during and 72 hours after either drug to prevent reaction.
Key facts
Severity
Moderate — caution required
Mechanism
Both drugs inhibit aldehyde dehydrogenase; concurrent alcohol exposure causes acetaldehyde accumulation producing a disu...
Action
Although co-prescription is rare, avoid duplicating nitroimidazoles. Counsel patients to avoid alcohol during and 72 hou...
Frequently asked questions
Can I take Metronidazole and Tinidazole together?
With caution. Although co-prescription is rare, avoid duplicating nitroimidazoles. Counsel patients to avoid alcohol during and 72 hours after either drug to prevent reaction.
What is the severity of this interaction?
The interaction between Metronidazole and Tinidazole is classified as Moderate — caution required. Both drugs inhibit aldehyde dehydrogenase; concurrent alcohol exposure causes acetaldehyde accumulation producing a disulfiram-like reaction (flushing, vomiting, tachycardia, headache).
What should I do if I'm prescribed both?
Although co-prescription is rare, avoid duplicating nitroimidazoles. Counsel patients to avoid alcohol during and 72 hours after either drug to prevent reaction. Always consult your prescribing clinician — do not stop or change medications without medical guidance.
Last reviewed: by iMedic Medical Editorial Team. Our editorial process.