Drug interactions
Pneumococcal vaccine polyvalent + Siponimod
Severity: Moderate
Pneumococcal vaccine polyvalent 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 lowers circulating lymphocytes, so the vaccine antibody response may be weaker. The vaccine is inactivated, so the main concern is reduced protection.
What this interaction means in plain words
Pneumococcal vaccine polyvalent 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 sequesters lymphocytes, blunting the vaccine immune response.
What to do
Vaccinate before starting siponimod where possible. If given during treatment, consider checking the antibody response.
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?
Pro+ members
Unlock the full page
Create an account and start a Pro+ trial to unlock the full management advice for Pneumococcal vaccine polyvalent and Siponimod, the additional notes, the evidence detail and the whole-prescription interaction checker.
- Full clinical management advice
- Additional notes
- Evidence detail
- Interaction checker for a whole prescription
Try Pro+ free for 7 days on the web. No card needed.
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 Pneumococcal vaccine polyvalent with Siponimod?
MediHelp rates the interaction as moderate. Pneumococcal vaccine polyvalent 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 lowers circulating lymphocytes, so the vaccine antibody response may be weaker. The vaccine is inactivated, so the main concern is reduced protection.
How serious is the interaction between Pneumococcal vaccine polyvalent 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: Vaccinate before starting siponimod where possible. If given during treatment, consider checking the antibody response.
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.
Full monographs, dosing and an interaction checker in the MediHelp app
Open the complete reference, check multi-drug interactions and use dosing tools in the MediHelp app.
