Drug interactions
Brentuximab vedotin + Siponimod
Severity: Major
Brentuximab vedotin and Siponimod: major 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
Brentuximab vedotin can cause neutropenia and serious infections, and it carries a risk of progressive multifocal leukoencephalopathy. Siponimod also carries infection and PML risk, so the combination may increase these concerns.
What this interaction means in plain words
Brentuximab vedotin and Siponimod can interact in a way that may be serious. Using them together is sometimes necessary, but it needs a deliberate decision by the prescriber, a plan for monitoring, and clear advice on the warning signs to watch for.
Brentuximab vedotin belongs to Oncology; Siponimod belongs to Central Nervous System.
Why it happens
Additive immunosuppression from S1P-mediated lymphocyte sequestration and cytotoxic antibody-drug conjugate myelosuppression.
What to do
Avoid the combination if possible, or hold siponimod during brentuximab treatment. If used together, monitor neutrophil and lymphocyte counts and infection signs, including neurological symptoms suggesting PML.
What to ask your pharmacist
- Does the benefit of taking both outweigh the risk in my case?
- Do I need any blood test, ECG or other check while on both?
- What early warning signs should I watch for, and what should I do if they appear?
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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
Other interactions of Brentuximab vedotin
- Bleomycin + Brentuximab vedotin Contraindicated
- Apalutamide + Brentuximab vedotin Moderate
- Brentuximab vedotin + Clarithromycin Moderate
- Brentuximab vedotin + Imatinib Moderate
- Brentuximab vedotin + Isoniazid Moderate
- Brentuximab vedotin + Itraconazole Moderate
Frequently asked questions
Can I take Brentuximab vedotin with Siponimod?
MediHelp rates the interaction as major. Brentuximab vedotin and Siponimod can interact in a way that may be serious. Using them together is sometimes necessary, but it needs a deliberate decision by the prescriber, a plan for monitoring, and clear advice on the warning signs to watch for. Brentuximab vedotin can cause neutropenia and serious infections, and it carries a risk of progressive multifocal leukoencephalopathy. Siponimod also carries infection and PML risk, so the combination may increase these concerns.
How serious is the interaction between Brentuximab vedotin and Siponimod?
MediHelp rates it major, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Avoid the combination if possible, or hold siponimod during brentuximab treatment. If used together, monitor neutrophil and lymphocyte counts and infection signs, including neurological symptoms suggesting PML.
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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