Drug interactions
Dronedarone + Erythromycin base
Severity: Contraindicated
Dronedarone and Erythromycin base: contraindicated interaction.
Last updated Sources: US FDA label
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
Erythromycin inhibits CYP3A4 and raises dronedarone levels, and both drugs prolong the QT interval. The combination increases the risk of torsades de pointes.
What this interaction means in plain words
Dronedarone and Erythromycin base 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.
Why it happens
CYP3A4 inhibition with additive QT prolongation.
What to do
Avoid the combination; use a non-macrolide or a macrolide with less QT and CYP3A effect such as azithromycin, with caution.
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?
Pro+ members
Unlock the full page
Create an account and start a Pro+ trial to unlock the full management advice for Dronedarone and Erythromycin base, the additional notes, the evidence detail and the whole-prescription interaction checker.
- Full clinical management advice
- Additional notes
- Evidence detail
- Interaction checker for a whole prescription
Try Pro+ free for 7 days on the web. No card needed.
References
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 Erythromycin base?
MediHelp rates the interaction as contraindicated. Dronedarone and Erythromycin base 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. Erythromycin inhibits CYP3A4 and raises dronedarone levels, and both drugs prolong the QT interval. The combination increases the risk of torsades de pointes.
How serious is the interaction between Dronedarone and Erythromycin base?
MediHelp rates it contraindicated, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Avoid the combination; use a non-macrolide or a macrolide with less QT and CYP3A effect such as azithromycin, with caution.
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.
Full monographs, dosing and an interaction checker in the MediHelp app
Open the complete reference, check multi-drug interactions and use dosing tools in the MediHelp app.
