Drug interactions
Dronedarone + Lefamulin
Severity: Major
Dronedarone and Lefamulin: 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
Lefamulin prolongs the QT interval and inhibits CYP3A4, especially with oral dosing, which may raise dronedarone levels. Together they increase risk of torsades de pointes.
What this interaction means in plain words
Dronedarone and Lefamulin 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.
Dronedarone belongs to Cardiovascular; Lefamulin belongs to Anti Bacterial.
Why it happens
Additive QT prolongation with CYP3A4 inhibition.
What to do
Avoid oral lefamulin and choose another antibiotic; if unavoidable, monitor ECG.
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 Dronedarone
- Adagrasib + Dronedarone Contraindicated
- Amiodarone + Dronedarone Contraindicated
- Arsenic trioxide + Dronedarone Contraindicated
- Artemether / lumefantrine + Dronedarone Contraindicated
- Atazanavir + Dronedarone Contraindicated
- Azithromycin + Dronedarone Contraindicated
Other interactions of Lefamulin
- Lefamulin + Methadone Contraindicated
- Lefamulin + Pimavanserin Contraindicated
- Lefamulin + Pimozide Contraindicated
- Lefamulin + Quinidine Contraindicated
- Alfuzosin + Lefamulin Major
- Amiodarone + Lefamulin Major
Frequently asked questions
Can I take Dronedarone with Lefamulin?
MediHelp rates the interaction as major. Dronedarone and Lefamulin 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. Lefamulin prolongs the QT interval and inhibits CYP3A4, especially with oral dosing, which may raise dronedarone levels. Together they increase risk of torsades de pointes.
How serious is the interaction between Dronedarone and Lefamulin?
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 oral lefamulin and choose another antibiotic; if unavoidable, monitor ECG.
What other medicines interact with Dronedarone?
MediHelp also lists interactions of Dronedarone with, for example, Adagrasib, Amiodarone, Arsenic trioxide. The full list is on the Dronedarone page.
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