Drug interactions
Rilpivirine + Siponimod
Severity: Moderate
Rilpivirine and Siponimod: 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
Rilpivirine at higher doses can prolong the QT interval, and siponimod slows heart rate when started. The combination may raise the risk of arrhythmia.
What this interaction means in plain words
Rilpivirine and Siponimod 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.
Rilpivirine belongs to Anti Virals; Siponimod belongs to Central Nervous System.
Why it happens
Additive QT prolongation with bradycardia.
What to do
Obtain a baseline ECG and keep electrolytes normal. Monitor heart rate and ECG at initiation of siponimod.
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 Siponimod
- Cladribine + Siponimod Contraindicated
- Fingolimod + Siponimod Contraindicated
- Fluconazole + Siponimod Contraindicated
- Influenza virus vaccine quadrivalent intranasal + Siponimod Contraindicated
- Ponesimod + Siponimod Contraindicated
- Siponimod + Thioridazine Contraindicated
Other interactions of Rilpivirine
- Carbamazepine + Rilpivirine Contraindicated
- Dexamethasone + Rilpivirine Contraindicated
- Dexlansoprazole + Rilpivirine Contraindicated
- Efavirenz + Rilpivirine Contraindicated
- Eslicarbazepine + Rilpivirine Contraindicated
- Esomeprazole + Rilpivirine Contraindicated
Frequently asked questions
Can I take Rilpivirine with Siponimod?
MediHelp rates the interaction as moderate. Rilpivirine and Siponimod 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. Rilpivirine at higher doses can prolong the QT interval, and siponimod slows heart rate when started. The combination may raise the risk of arrhythmia.
How serious is the interaction between Rilpivirine and Siponimod?
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 and keep electrolytes normal. Monitor heart rate and ECG at initiation of siponimod.
What other medicines interact with Siponimod?
MediHelp also lists interactions of Siponimod with, for example, Cladribine, Fingolimod, Fluconazole. The full list is on the Siponimod page.
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