Drug interactions
Amiodarone + Ofloxacin
Severity: Major
Amiodarone and Ofloxacin: major 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
Amiodarone markedly prolongs the QT interval and ofloxacin can add to this effect, raising the risk of torsades de pointes. The risk is higher with hypokalemia, bradycardia or structural heart disease.
What this interaction means in plain words
Amiodarone and Ofloxacin can interact in a way that may be serious. Using them together is sometimes necessary, but it needs a deliberate decision by the prescriber, a plan for monitoring, and clear advice on the warning signs to watch for.
Amiodarone belongs to Cardiovascular; Ofloxacin belongs to Anti Bacterial.
Why it happens
Additive potassium channel blockade causing delayed ventricular repolarization.
What to do
Avoid the combination and use a non-QT-prolonging antibiotic. If unavoidable, monitor ECG and keep potassium and magnesium within normal range.
What to ask your pharmacist
- Does the benefit of taking both outweigh the risk in my case?
- Do I need any blood test, ECG or other check while on both?
- What early warning signs should I watch for, and what should I do if they appear?
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Other interactions of Ofloxacin
- Ofloxacin + Thioridazine Contraindicated
- Adagrasib + Ofloxacin Major
- Amisulpride + Ofloxacin Major
- Anagrelide + Ofloxacin Major
- Arsenic trioxide + Ofloxacin Major
- Artemether / lumefantrine + Ofloxacin 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 Ofloxacin?
MediHelp rates the interaction as major. Amiodarone and Ofloxacin can interact in a way that may be serious. Using them together is sometimes necessary, but it needs a deliberate decision by the prescriber, a plan for monitoring, and clear advice on the warning signs to watch for. Amiodarone markedly prolongs the QT interval and ofloxacin can add to this effect, raising the risk of torsades de pointes. The risk is higher with hypokalemia, bradycardia or structural heart disease.
How serious is the interaction between Amiodarone and Ofloxacin?
MediHelp rates it major, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Avoid the combination and use a non-QT-prolonging antibiotic. If unavoidable, monitor ECG and keep potassium and magnesium within normal range.
What other medicines interact with Ofloxacin?
MediHelp also lists interactions of Ofloxacin with, for example, Thioridazine, Adagrasib, Amisulpride. The full list is on the Ofloxacin page.
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