Drug interactions
Omacetaxine + Siponimod
Severity: Major
Omacetaxine 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
Omacetaxine causes pronounced myelosuppression, including neutropenia and thrombocytopenia, and siponimod lowers lymphocyte counts. Combined use may increase the risk of serious infection.
What this interaction means in plain words
Omacetaxine 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.
Why it happens
Additive effects on immune cells: marrow suppression by omacetaxine plus S1P-mediated lymphocyte sequestration.
What to do
Avoid concomitant use if possible, or hold siponimod during omacetaxine cycles. 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
Frequently asked questions
Can I take Omacetaxine with Siponimod?
MediHelp rates the interaction as major. Omacetaxine 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. Omacetaxine causes pronounced myelosuppression, including neutropenia and thrombocytopenia, and siponimod lowers lymphocyte counts. Combined use may increase the risk of serious infection.
How serious is the interaction between Omacetaxine 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 concomitant use if possible, or hold siponimod during omacetaxine cycles. 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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