Drug interactions
Influenza virus vaccine quadrivalent recombinant + Siponimod
Severity: Moderate
Influenza virus vaccine quadrivalent recombinant 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 reduces circulating lymphocytes, which can blunt the antibody response to inactivated or recombinant vaccines. Vaccination during treatment may therefore give inadequate protection against influenza.
What this interaction means in plain words
Influenza virus vaccine quadrivalent recombinant 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.
Why it happens
S1P receptor modulation traps lymphocytes in lymphoid tissue and impairs vaccine-induced immune responses.
What to do
Where possible, give the vaccine at least 1 week before starting siponimod, or consider pausing siponimod around vaccination as per the product labeling. Inactivated influenza vaccination should not be withheld solely because of siponimod.
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
Frequently asked questions
Can I take Influenza virus vaccine quadrivalent recombinant with Siponimod?
MediHelp rates the interaction as moderate. Influenza virus vaccine quadrivalent recombinant 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 reduces circulating lymphocytes, which can blunt the antibody response to inactivated or recombinant vaccines. Vaccination during treatment may therefore give inadequate protection against influenza.
How serious is the interaction between Influenza virus vaccine quadrivalent recombinant 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: Where possible, give the vaccine at least 1 week before starting siponimod, or consider pausing siponimod around vaccination as per the product labeling. Inactivated influenza vaccination should not be withheld solely because of siponimod.
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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