Drug interactions
Dronedarone + Erythromycin lactobionate
Severity: Contraindicated
Dronedarone and Erythromycin lactobionate: 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
Intravenous erythromycin inhibits CYP3A4, increasing dronedarone exposure, and both drugs prolong the QT interval. The risk of torsades de pointes is therefore increased.
What this interaction means in plain words
Dronedarone and Erythromycin lactobionate 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; Erythromycin lactobionate belongs to Anti Bacterial.
Why it happens
CYP3A4 inhibition with additive QT prolongation.
What to do
Avoid the combination; use an alternative intravenous antibiotic, and hold dronedarone with ECG monitoring if a macrolide is essential.
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 lactobionate, 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 14 days on the web. No card needed.
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 Erythromycin lactobionate
- Cisapride + Erythromycin lactobionate Contraindicated
- Dihydroergotamine + Erythromycin lactobionate Contraindicated
- Eletriptan + Erythromycin lactobionate Contraindicated
- Ergotamine + Erythromycin lactobionate Contraindicated
- Erythromycin lactobionate + Flibanserin Contraindicated
- Erythromycin lactobionate + Lovastatin Contraindicated
Frequently asked questions
Can I take Dronedarone with Erythromycin lactobionate?
MediHelp rates the interaction as contraindicated. Dronedarone and Erythromycin lactobionate 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. Intravenous erythromycin inhibits CYP3A4, increasing dronedarone exposure, and both drugs prolong the QT interval. The risk of torsades de pointes is therefore increased.
How serious is the interaction between Dronedarone and Erythromycin lactobionate?
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 an alternative intravenous antibiotic, and hold dronedarone with ECG monitoring if a macrolide is essential.
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.
