Drug interactions
Siponimod + Tocilizumab
Severity: Moderate
Siponimod and Tocilizumab: 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 tocilizumab blocks IL-6 signaling, so combined use may increase infection risk. Siponimod's immune effects persist for weeks after discontinuation.
What this interaction means in plain words
Siponimod and Tocilizumab 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; Tocilizumab belongs to Musculoskeletal.
Why it happens
Additive immunosuppression from S1P receptor modulation and IL-6 receptor blockade.
What to do
Monitor lymphocyte and neutrophil counts and watch for infection, remembering tocilizumab can mask fever. Account for the residual effect of siponimod when switching therapies.
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 Tocilizumab
- Bcg vaccine live + Tocilizumab Contraindicated
- Measles mumps and rubella vaccine live + Tocilizumab Contraindicated
- Measles mumps rubella and varicella vaccine live + Tocilizumab Contraindicated
- Measles vaccine + Tocilizumab Contraindicated
- Rubella vaccine + Tocilizumab Contraindicated
- Smallpox vaccine live + Tocilizumab Contraindicated
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 Tocilizumab?
MediHelp rates the interaction as moderate. Siponimod and Tocilizumab 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 tocilizumab blocks IL-6 signaling, so combined use may increase infection risk. Siponimod's immune effects persist for weeks after discontinuation.
How serious is the interaction between Siponimod and Tocilizumab?
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 lymphocyte and neutrophil counts and watch for infection, remembering tocilizumab can mask fever. Account for the residual effect of siponimod when switching therapies.
What other medicines interact with Tocilizumab?
MediHelp also lists interactions of Tocilizumab with, for example, Bcg vaccine live, Measles mumps and rubella vaccine live, Measles mumps rubella and varicella vaccine live. The full list is on the Tocilizumab page.
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