Drug interactions
Siponimod + Trifluridine / tipiracil
Severity: Moderate
Siponimod and Trifluridine / tipiracil: 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
Siponimod lowers circulating lymphocytes, and trifluridine/tipiracil causes myelosuppression including neutropenia and lymphopenia. Used together they may increase the risk of serious infection.
What this interaction means in plain words
Siponimod and Trifluridine / tipiracil 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.
Why it happens
Additive immunosuppression and bone marrow suppression through different mechanisms.
What to do
Monitor complete blood counts and for signs of infection throughout therapy. Consider interrupting siponimod if severe neutropenia or infection develops.
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
Frequently asked questions
Can I take Siponimod with Trifluridine / tipiracil?
MediHelp rates the interaction as moderate. Siponimod and Trifluridine / tipiracil 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. Siponimod lowers circulating lymphocytes, and trifluridine/tipiracil causes myelosuppression including neutropenia and lymphopenia. Used together they may increase the risk of serious infection.
How serious is the interaction between Siponimod and Trifluridine / tipiracil?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Monitor complete blood counts and for signs of infection throughout therapy. Consider interrupting siponimod if severe neutropenia or infection develops.
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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