Drug interactions
Siponimod + Temozolomide
Severity: Moderate
Siponimod and Temozolomide: 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
Temozolomide causes myelosuppression and lymphopenia, and siponimod lowers circulating lymphocytes. Together they can deepen lymphopenia and increase the risk of infection, including opportunistic infection.
What this interaction means in plain words
Siponimod and Temozolomide 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 belongs to Central Nervous System; Temozolomide belongs to Oncology.
Why it happens
Additive effects on lymphocytes: S1P receptor-mediated lymphocyte sequestration plus DNA-alkylating bone marrow suppression.
What to do
Monitor complete blood counts with lymphocyte counts and watch for infection during combined therapy. Consider whether siponimod should be paused during chemotherapy.
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 Temozolomide
Frequently asked questions
Can I take Siponimod with Temozolomide?
MediHelp rates the interaction as moderate. Siponimod and Temozolomide 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. Temozolomide causes myelosuppression and lymphopenia, and siponimod lowers circulating lymphocytes. Together they can deepen lymphopenia and increase the risk of infection, including opportunistic infection.
How serious is the interaction between Siponimod and Temozolomide?
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 with lymphocyte counts and watch for infection during combined therapy. Consider whether siponimod should be paused during chemotherapy.
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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