Drug interactions
Amiodarone + Tinidazole
Severity: Moderate
Amiodarone and Tinidazole: moderate interaction.
Last updated
For healthcare professionals — reference only. This page is a brief summary, not medical advice and not a substitute for official labeling or clinical judgement. Always verify before prescribing or dispensing.
Summary
Tinidazole is partly metabolized by CYP3A4, and amiodarone is only a weak to moderate CYP3A4 inhibitor, so a significant rise in tinidazole is unlikely. The more relevant concern is that both drugs may prolong the QT interval, with a risk of torsades de pointes.
What this interaction means in plain words
Amiodarone and Tinidazole can affect each other. The combination is often manageable, but it may need a change of dose, a change of timing, or extra checks while both are taken.
Amiodarone belongs to Cardiovascular; Tinidazole belongs to Anti Parasitic.
Why it happens
Additive QT prolongation, with a minor possible pharmacokinetic effect through CYP3A4 inhibition by amiodarone.
What to do
Obtain a baseline ECG, keep potassium and magnesium normal, and monitor QTc during co-administration. Consider an alternative antimicrobial if the QTc becomes prolonged.
What to ask your pharmacist
- Should I take them at different times of day?
- Does the dose of either medicine need to change?
- Is there anything I should avoid, such as alcohol or certain foods, while on both?
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Other interactions of Tinidazole
- Disulfiram + Tinidazole Contraindicated
- Ethanol + Tinidazole Major
- Fexinidazole + Tinidazole Major
- Lopinavir + Tinidazole Major
- Nilotinib + Tinidazole Major
- Ritonavir + Tinidazole Major
Other interactions of Amiodarone
- Amiodarone + Amisulpride Contraindicated
- Amiodarone + Arsenic trioxide Contraindicated
- Amiodarone + Dofetilide Contraindicated
- Amiodarone + Dronedarone Contraindicated
- Amiodarone + Droperidol Contraindicated
- Amiodarone + Eliglustat Contraindicated
Frequently asked questions
Can I take Amiodarone with Tinidazole?
MediHelp rates the interaction as moderate. Amiodarone and Tinidazole can affect each other. The combination is often manageable, but it may need a change of dose, a change of timing, or extra checks while both are taken. Tinidazole is partly metabolized by CYP3A4, and amiodarone is only a weak to moderate CYP3A4 inhibitor, so a significant rise in tinidazole is unlikely. The more relevant concern is that both drugs may prolong the QT interval, with a risk of torsades de pointes.
How serious is the interaction between Amiodarone and Tinidazole?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Obtain a baseline ECG, keep potassium and magnesium normal, and monitor QTc during co-administration. Consider an alternative antimicrobial if the QTc becomes prolonged.
What other medicines interact with Tinidazole?
MediHelp also lists interactions of Tinidazole with, for example, Disulfiram, Ethanol, Fexinidazole. The full list is on the Tinidazole page.
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