Drug interactions
Ipilimumab + Siponimod
Severity: Moderate
Ipilimumab 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
Siponimod lowers circulating lymphocytes, while ipilimumab is an immune checkpoint inhibitor that causes immune activation with possible immune-related adverse events. Opposing immune effects make the combined outcome unpredictable, and any corticosteroid treatment of immune-related events adds to infection risk. Safety data for the combination are limited.
What this interaction means in plain words
Ipilimumab 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.
Ipilimumab belongs to Oncology; Siponimod belongs to Central Nervous System.
Why it happens
Pharmacodynamic: S1P receptor modulation sequesters lymphocytes in lymphoid tissue while CTLA-4 blockade alters T-cell activation, with unpredictable combined immune effects.
What to do
Avoid starting siponimod during or shortly after ipilimumab unless the benefit clearly outweighs the risk; monitor lymphocyte counts and for infection and immune-related toxicity.
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 Ipilimumab
Frequently asked questions
Can I take Ipilimumab with Siponimod?
MediHelp rates the interaction as moderate. Ipilimumab 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. Siponimod lowers circulating lymphocytes, while ipilimumab is an immune checkpoint inhibitor that causes immune activation with possible immune-related adverse events. Opposing immune effects make the combined outcome unpredictable, and any corticosteroid treatment of immune-related events adds to infection risk. Safety data for the combination are limited.
How serious is the interaction between Ipilimumab 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: Avoid starting siponimod during or shortly after ipilimumab unless the benefit clearly outweighs the risk; monitor lymphocyte counts and for infection and immune-related toxicity.
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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