Drug interactions
Denosumab + Siponimod
Severity: Moderate
Denosumab 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 with effects lasting after discontinuation, and denosumab has been associated with serious infections. Combined use may increase infection risk.
What this interaction means in plain words
Denosumab 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.
Denosumab belongs to Oncology; Siponimod belongs to Central Nervous System.
Why it happens
Additive pharmacodynamic effect: S1P receptor modulation sequesters lymphocytes while denosumab inhibits RANKL signalling in immune cells.
What to do
Monitor for infection and lymphocyte counts, including for weeks after siponimod is stopped. Treat infections early.
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 Denosumab
- Abatacept + Denosumab Moderate
- Adalimumab + Denosumab Moderate
- Alefacept + Denosumab Moderate
- Alemtuzumab + Denosumab Moderate
- Anakinra + Denosumab Moderate
- Azacitidine + Denosumab Moderate
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 Denosumab with Siponimod?
MediHelp rates the interaction as moderate. Denosumab 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 with effects lasting after discontinuation, and denosumab has been associated with serious infections. Combined use may increase infection risk.
How serious is the interaction between Denosumab 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: Monitor for infection and lymphocyte counts, including for weeks after siponimod is stopped. Treat infections early.
What other medicines interact with Denosumab?
MediHelp also lists interactions of Denosumab with, for example, Abatacept, Adalimumab, Alefacept. The full list is on the Denosumab page.
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