Drug interactions
Diphtheria and tetanus toxoids / acellular pertussis / poliovirus inactivated vaccine + Siponimod
Severity: Moderate
Diphtheria and tetanus toxoids / acellular pertussis / poliovirus inactivated vaccine 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 may blunt the immune response to this inactivated combination vaccine, reducing protection. No live-organism infection risk is involved.
What this interaction means in plain words
Diphtheria and tetanus toxoids / acellular pertussis / poliovirus inactivated vaccine 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
Lymphocyte sequestration from S1P receptor modulation blunts antibody response.
What to do
Give vaccination at least 1 week before siponimod when possible. If given during therapy, consider checking 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?
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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 Diphtheria and tetanus toxoids / acellular pertussis / poliovirus inactivated vaccine with Siponimod?
MediHelp rates the interaction as moderate. Diphtheria and tetanus toxoids / acellular pertussis / poliovirus inactivated vaccine 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 may blunt the immune response to this inactivated combination vaccine, reducing protection. No live-organism infection risk is involved.
How serious is the interaction between Diphtheria and tetanus toxoids / acellular pertussis / poliovirus inactivated vaccine 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: Give vaccination at least 1 week before siponimod when possible. If given during therapy, consider checking 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.
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