Drug interactions
Nelarabine + Siponimod
Severity: Major
Nelarabine 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
Nelarabine is a cytotoxic purine analogue that depletes T-cells and causes myelosuppression, and siponimod lowers circulating lymphocytes. Together they can increase the risk of serious infection.
What this interaction means in plain words
Nelarabine 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.
Nelarabine belongs to Oncology; Siponimod belongs to Central Nervous System.
Why it happens
Additive lymphocyte depletion: S1P receptor-mediated lymphocyte sequestration by siponimod plus cytotoxic T-cell and marrow suppression by nelarabine.
What to do
Avoid combining where possible and consider holding siponimod during nelarabine chemotherapy. If used together, monitor blood counts and infection signs closely.
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 Nelarabine
- Deferiprone + Nelarabine Major
- Nelarabine + Pentostatin Major
- Nelarabine + Tofacitinib Major
- Denosumab + Nelarabine Moderate
- Fingolimod + Nelarabine Moderate
- Hydroxyurea + Nelarabine Moderate
Frequently asked questions
Can I take Nelarabine with Siponimod?
MediHelp rates the interaction as major. Nelarabine 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. Nelarabine is a cytotoxic purine analogue that depletes T-cells and causes myelosuppression, and siponimod lowers circulating lymphocytes. Together they can increase the risk of serious infection.
How serious is the interaction between Nelarabine 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 combining where possible and consider holding siponimod during nelarabine chemotherapy. If used together, monitor blood counts and infection signs closely.
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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