Drug interactions
Siponimod + Yellow fever vaccine
Severity: Major
Siponimod and Yellow fever vaccine: 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
Siponimod reduces circulating lymphocytes, which may blunt the immune response to vaccination. A live attenuated vaccine such as yellow fever carries a risk of vaccine-related infection in patients with suppressed immunity.
What this interaction means in plain words
Siponimod and Yellow fever vaccine 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
Siponimod sequesters lymphocytes in lymphoid tissue, causing immunosuppression that impairs vaccine response and allows replication of live vaccine virus.
What to do
Avoid live vaccines during siponimod therapy and for about 4 weeks after stopping. Give any needed live vaccine at least 1 week before starting siponimod, and use non-live alternatives or a documented waiver where appropriate.
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 Yellow fever vaccine?
MediHelp rates the interaction as major. Siponimod and Yellow fever vaccine 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. Siponimod reduces circulating lymphocytes, which may blunt the immune response to vaccination. A live attenuated vaccine such as yellow fever carries a risk of vaccine-related infection in patients with suppressed immunity.
How serious is the interaction between Siponimod and Yellow fever vaccine?
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 live vaccines during siponimod therapy and for about 4 weeks after stopping. Give any needed live vaccine at least 1 week before starting siponimod, and use non-live alternatives or a documented waiver where appropriate.
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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