Drug interactions
Flecainide + Ponesimod
Severity: Major
Flecainide and Ponesimod: 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
Ponesimod lowers heart rate and can slow AV conduction, particularly when treatment is started. Flecainide slows cardiac conduction and may cause bradyarrhythmia or proarrhythmia, so the combination may produce additive conduction effects.
What this interaction means in plain words
Flecainide and Ponesimod 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.
Flecainide belongs to Cardiovascular; Ponesimod belongs to Central Nervous System.
Why it happens
Additive negative chronotropic and dromotropic effects.
What to do
Avoid starting ponesimod in patients on flecainide unless cardiology advises. If used, monitor heart rate and ECG, especially during initiation.
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 Flecainide
- Flecainide + Nirmatrelvir Contraindicated
- Flecainide + Nirmatrelvir / ritonavir Contraindicated
- Flecainide + Pimozide Contraindicated
- Flecainide + Ritonavir Contraindicated
- Flecainide + Thioridazine Contraindicated
- Flecainide + Tipranavir Contraindicated
Other interactions of Ponesimod
- Fingolimod + Ponesimod Contraindicated
- Ponesimod + Siponimod Contraindicated
- Amiodarone + Ponesimod Major
- Amisulpride + Ponesimod Major
- Anagrelide + Ponesimod Major
- Anti-thymocyte + Ponesimod Major
Frequently asked questions
Can I take Flecainide with Ponesimod?
MediHelp rates the interaction as major. Flecainide and Ponesimod 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. Ponesimod lowers heart rate and can slow AV conduction, particularly when treatment is started. Flecainide slows cardiac conduction and may cause bradyarrhythmia or proarrhythmia, so the combination may produce additive conduction effects.
How serious is the interaction between Flecainide and Ponesimod?
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 starting ponesimod in patients on flecainide unless cardiology advises. If used, monitor heart rate and ECG, especially during initiation.
What other medicines interact with Flecainide?
MediHelp also lists interactions of Flecainide with, for example, Nirmatrelvir, Nirmatrelvir / ritonavir, Pimozide. The full list is on the Flecainide page.
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