Drug interactions
Ponesimod + Primaquine
Severity: Moderate
Ponesimod and Primaquine: moderate 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 slows heart rate and can affect cardiac conduction, and primaquine has some QT-prolonging potential. Combined use may add to arrhythmia risk, particularly at treatment initiation.
What this interaction means in plain words
Ponesimod and Primaquine can affect each other. The combination is often manageable, but it may need a change of dose, a change of timing, or extra checks while both are taken.
Ponesimod belongs to Central Nervous System; Primaquine belongs to Anti Parasitic.
Why it happens
Additive pharmacodynamic effects: primaquine QT prolongation and ponesimod-induced bradycardia.
What to do
Obtain a baseline ECG before starting ponesimod and monitor heart rate and QTc. Seek specialist advice before combining in patients with other QT risk factors.
What to ask your pharmacist
- Should I take them at different times of day?
- Does the dose of either medicine need to change?
- Is there anything I should avoid, such as alcohol or certain foods, while on both?
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Other interactions of Primaquine
- Pimozide + Primaquine Contraindicated
- Amiodarone + Primaquine Major
- Amisulpride + Primaquine Major
- Anagrelide + Primaquine Major
- Arsenic trioxide + Primaquine Major
- Asenapine + Primaquine Major
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 Ponesimod with Primaquine?
MediHelp rates the interaction as moderate. Ponesimod and Primaquine can affect each other. The combination is often manageable, but it may need a change of dose, a change of timing, or extra checks while both are taken. Ponesimod slows heart rate and can affect cardiac conduction, and primaquine has some QT-prolonging potential. Combined use may add to arrhythmia risk, particularly at treatment initiation.
How serious is the interaction between Ponesimod and Primaquine?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Obtain a baseline ECG before starting ponesimod and monitor heart rate and QTc. Seek specialist advice before combining in patients with other QT risk factors.
What other medicines interact with Primaquine?
MediHelp also lists interactions of Primaquine with, for example, Pimozide, Amiodarone, Amisulpride. The full list is on the Primaquine page.
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