Drug interactions
Dronedarone + Protriptyline
Severity: Major
Dronedarone and Protriptyline: major 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
Both drugs prolong the QT interval, so combining them raises the risk of torsades de pointes and other serious ventricular arrhythmias. Dronedarone labeling advises against use with other QT-prolonging agents such as tricyclic antidepressants.
What this interaction means in plain words
Dronedarone and Protriptyline 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.
Why it happens
Additive prolongation of cardiac repolarization (QTc) through pharmacodynamic synergy.
What to do
Avoid the combination and choose an antidepressant with less QT effect. If it cannot be avoided, obtain a baseline and follow-up ECG and correct potassium and magnesium.
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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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 Protriptyline?
MediHelp rates the interaction as major. Dronedarone and Protriptyline 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. Both drugs prolong the QT interval, so combining them raises the risk of torsades de pointes and other serious ventricular arrhythmias. Dronedarone labeling advises against use with other QT-prolonging agents such as tricyclic antidepressants.
How serious is the interaction between Dronedarone and Protriptyline?
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 choose an antidepressant with less QT effect. If it cannot be avoided, obtain a baseline and follow-up ECG and correct potassium and magnesium.
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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