Drug interactions
Niraparib + Siponimod
Severity: Moderate
Niraparib 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
Niraparib causes myelosuppression, including neutropenia and thrombocytopenia, and siponimod lowers lymphocyte counts. Combined use may raise the risk of infection in a patient with reduced blood counts.
What this interaction means in plain words
Niraparib 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.
Niraparib belongs to Oncology; Siponimod belongs to Central Nervous System.
Why it happens
Additive hematologic effects: S1P-mediated lymphocyte sequestration plus PARP-inhibitor bone marrow suppression.
What to do
Monitor complete blood counts regularly and watch for signs of infection. Consider interrupting siponimod if severe neutropenia or lymphopenia 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
Other interactions of Niraparib
- Niraparib + Oxaliplatin Moderate
Frequently asked questions
Can I take Niraparib with Siponimod?
MediHelp rates the interaction as moderate. Niraparib 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. Niraparib causes myelosuppression, including neutropenia and thrombocytopenia, and siponimod lowers lymphocyte counts. Combined use may raise the risk of infection in a patient with reduced blood counts.
How serious is the interaction between Niraparib 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: Monitor complete blood counts regularly and watch for signs of infection. Consider interrupting siponimod if severe neutropenia or lymphopenia 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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