Drug interactions
Blinatumomab + Siponimod
Severity: Moderate
Blinatumomab 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
Blinatumomab engages T cells against CD19-positive B cells and causes B-cell depletion, cytopenias and infections. Combining it with siponimod, which reduces circulating lymphocytes, may add to infection risk and may blunt T-cell redirected activity.
What this interaction means in plain words
Blinatumomab 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.
Blinatumomab belongs to Oncology; Siponimod belongs to Central Nervous System.
Why it happens
Additive immune suppression from B-cell depletion and S1P-mediated lymphocyte sequestration.
What to do
Monitor for infection and check blood counts regularly. Siponimod usually should be held during blinatumomab treatment, so decide this with the oncology and neurology teams.
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
Other interactions of Blinatumomab
- Blinatumomab + Carbamazepine Moderate
- Blinatumomab + Cyclosporin Moderate
- Blinatumomab + Ethosuximide Moderate
- Blinatumomab + Phenytoin Moderate
- Blinatumomab + Quinidine Moderate
- Blinatumomab + Quinine Moderate
Frequently asked questions
Can I take Blinatumomab with Siponimod?
MediHelp rates the interaction as moderate. Blinatumomab 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. Blinatumomab engages T cells against CD19-positive B cells and causes B-cell depletion, cytopenias and infections. Combining it with siponimod, which reduces circulating lymphocytes, may add to infection risk and may blunt T-cell redirected activity.
How serious is the interaction between Blinatumomab 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 check blood counts regularly. Siponimod usually should be held during blinatumomab treatment, so decide this with the oncology and neurology teams.
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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