Drug interactions
Granisetron + Ponesimod
Severity: Moderate
Granisetron and Ponesimod: 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 atrioventricular conduction at initiation, and granisetron can modestly prolong the QT interval. Bradycardia increases the risk of torsades de pointes with QT-prolonging drugs.
What this interaction means in plain words
Granisetron and Ponesimod 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.
Granisetron belongs to Gastrointestinal Tract; Ponesimod belongs to Central Nervous System.
Why it happens
Bradycardia from S1P receptor modulation combined with QT prolongation from granisetron.
What to do
Perform an ECG before starting ponesimod and monitor heart rate during titration. Correct electrolyte abnormalities and consider an alternative antiemetic in patients with 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 Granisetron
- Apomorphine + Granisetron Contraindicated
- Amiodarone + Granisetron Major
- Amisulpride + Granisetron Major
- Arsenic trioxide + Granisetron Major
- Artemether / lumefantrine + Granisetron Major
- Artemether + Granisetron 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 Granisetron with Ponesimod?
MediHelp rates the interaction as moderate. Granisetron and Ponesimod 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 atrioventricular conduction at initiation, and granisetron can modestly prolong the QT interval. Bradycardia increases the risk of torsades de pointes with QT-prolonging drugs.
How serious is the interaction between Granisetron and Ponesimod?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Perform an ECG before starting ponesimod and monitor heart rate during titration. Correct electrolyte abnormalities and consider an alternative antiemetic in patients with QT risk factors.
What other medicines interact with Granisetron?
MediHelp also lists interactions of Granisetron with, for example, Apomorphine, Amiodarone, Amisulpride. The full list is on the Granisetron page.
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