Drug interactions
Mycophenolate + Siponimod
Severity: Major
Mycophenolate and Siponimod: major interaction.
Last updated Sources: US FDA label
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
Mycophenolate suppresses T- and B-lymphocyte proliferation, and siponimod reduces circulating lymphocytes. Used together, they increase the risk of serious infection.
What this interaction means in plain words
Mycophenolate and Siponimod can interact in a way that may be serious. Using them together is sometimes necessary, but it needs a deliberate decision by the prescriber, a plan for monitoring, and clear advice on the warning signs to watch for.
Why it happens
Additive immunosuppression from inhibition of lymphocyte proliferation and S1P-receptor-mediated lymphocyte sequestration.
What to do
Avoid the combination if possible. If used, monitor lymphocyte and neutrophil counts and maintain infection surveillance.
What to ask your pharmacist
- Does the benefit of taking both outweigh the risk in my case?
- Do I need any blood test, ECG or other check while on both?
- What early warning signs should I watch for, and what should I do if they appear?
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References
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 Mycophenolate with Siponimod?
MediHelp rates the interaction as major. Mycophenolate and Siponimod can interact in a way that may be serious. Using them together is sometimes necessary, but it needs a deliberate decision by the prescriber, a plan for monitoring, and clear advice on the warning signs to watch for. Mycophenolate suppresses T- and B-lymphocyte proliferation, and siponimod reduces circulating lymphocytes. Used together, they increase the risk of serious infection.
How serious is the interaction between Mycophenolate and Siponimod?
MediHelp rates it major, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Avoid the combination if possible. If used, monitor lymphocyte and neutrophil counts and maintain infection surveillance.
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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