Drug interactions
Siponimod + Smallpox vaccine attenuated
Severity: Major
Siponimod and Smallpox vaccine attenuated: major 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
Attenuated vaccinia vaccine may still replicate in immunocompromised patients. Siponimod-induced lymphopenia could permit vaccine-strain infection and impair the immune response.
What this interaction means in plain words
Siponimod and Smallpox vaccine attenuated 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
Sphingosine-1-phosphate receptor modulation sequesters lymphocytes, causing immunosuppression that permits live vaccine replication.
What to do
Avoid during siponimod therapy and for 4 weeks after stopping. Vaccinate at least 1 week before starting siponimod if possible.
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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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 Smallpox vaccine attenuated?
MediHelp rates the interaction as major. Siponimod and Smallpox vaccine attenuated 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. Attenuated vaccinia vaccine may still replicate in immunocompromised patients. Siponimod-induced lymphopenia could permit vaccine-strain infection and impair the immune response.
How serious is the interaction between Siponimod and Smallpox vaccine attenuated?
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 during siponimod therapy and for 4 weeks after stopping. Vaccinate at least 1 week before starting siponimod if possible.
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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