Drug interactions
Human papillomavirus vaccine quadrivalent + Siponimod
Severity: Moderate
Human papillomavirus vaccine quadrivalent 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 lymphocyte availability and may reduce antibody responses to HPV vaccination. The vaccine is non-live and safe, but protection may be weaker. Completing vaccination before therapy is preferable.
What this interaction means in plain words
Human papillomavirus vaccine quadrivalent 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 and impairs vaccine immune response.
What to do
Give the vaccine at least 1 week before starting siponimod when feasible, or after about 4 weeks off treatment. Do not delay siponimod unnecessarily.
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 Human papillomavirus vaccine quadrivalent with Siponimod?
MediHelp rates the interaction as moderate. Human papillomavirus vaccine quadrivalent 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 lymphocyte availability and may reduce antibody responses to HPV vaccination. The vaccine is non-live and safe, but protection may be weaker. Completing vaccination before therapy is preferable.
How serious is the interaction between Human papillomavirus vaccine quadrivalent 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 the vaccine at least 1 week before starting siponimod when feasible, or after about 4 weeks off treatment. Do not delay siponimod unnecessarily.
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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