Drug interactions
Dronedarone + Levofloxacin
Severity: Contraindicated
Dronedarone and Levofloxacin: contraindicated 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
Dronedarone markedly prolongs the QT interval and is contraindicated with other QT-prolonging drugs that can induce torsades de pointes. Adding levofloxacin increases the risk of life-threatening arrhythmia.
What this interaction means in plain words
Dronedarone and Levofloxacin are not normally used together. Taking them at the same time is expected to cause harm or make one of them unsafe, so a different medicine is usually chosen for one of the two.
Dronedarone belongs to Cardiovascular; Levofloxacin belongs to Anti Bacterial.
Why it happens
Additive blockade of cardiac potassium channels prolonging ventricular repolarization.
What to do
Do not co-administer; select an antibiotic without QT liability. If a fluoroquinolone is essential, dronedarone must be withheld first.
What to ask your pharmacist
- Is there an alternative to one of these two medicines for me?
- If both are essential, who is monitoring me and how often?
- Which symptoms mean I should stop and seek help straight away?
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Other interactions of Levofloxacin
- Ibutilide + Levofloxacin Contraindicated
- Levofloxacin + Thioridazine Contraindicated
- Levofloxacin + Vandetanib Contraindicated
- Levofloxacin + Ziprasidone Contraindicated
- Adagrasib + Levofloxacin Major
- Amiodarone + Levofloxacin Major
Other interactions of Dronedarone
- Adagrasib + Dronedarone Contraindicated
- Amiodarone + Dronedarone Contraindicated
- Arsenic trioxide + Dronedarone Contraindicated
- Artemether / lumefantrine + Dronedarone Contraindicated
- Atazanavir + Dronedarone Contraindicated
- Azithromycin + Dronedarone Contraindicated
Frequently asked questions
Can I take Dronedarone with Levofloxacin?
MediHelp rates the interaction as contraindicated. Dronedarone and Levofloxacin are not normally used together. Taking them at the same time is expected to cause harm or make one of them unsafe, so a different medicine is usually chosen for one of the two. Dronedarone markedly prolongs the QT interval and is contraindicated with other QT-prolonging drugs that can induce torsades de pointes. Adding levofloxacin increases the risk of life-threatening arrhythmia.
How serious is the interaction between Dronedarone and Levofloxacin?
MediHelp rates it contraindicated, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Do not co-administer; select an antibiotic without QT liability. If a fluoroquinolone is essential, dronedarone must be withheld first.
What other medicines interact with Levofloxacin?
MediHelp also lists interactions of Levofloxacin with, for example, Ibutilide, Thioridazine, Vandetanib. The full list is on the Levofloxacin page.
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