Drug interactions
Netupitant-palonosetron + Siponimod
Severity: Moderate
Netupitant-palonosetron 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 is metabolized mainly by CYP2C9 with a smaller CYP3A4 contribution. Netupitant inhibits CYP3A4 moderately, which can raise siponimod exposure, especially in patients with reduced CYP2C9 activity. Higher siponimod levels increase the risk of bradycardia, infections and other adverse effects.
What this interaction means in plain words
Netupitant-palonosetron 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.
Netupitant-palonosetron belongs to Gastrointestinal Tract; Siponimod belongs to Central Nervous System.
Why it happens
Netupitant inhibits CYP3A4, reducing a secondary clearance pathway of siponimod.
What to do
Check the patient's CYP2C9 genotype or any other CYP2C9 inhibitors; siponimod labeling advises against combining with dual moderate CYP3A4/CYP2C9 inhibition. For a single short antiemetic course, monitor heart rate and adverse effects, or choose an alternative antiemetic.
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 Netupitant-palonosetron
- Apomorphine + Netupitant-palonosetron Contraindicated
- Flibanserin + Netupitant-palonosetron Contraindicated
- Apalutamide + Netupitant-palonosetron Major
- Avapritinib + Netupitant-palonosetron Major
- Carbamazepine + Netupitant-palonosetron Major
- Cobimetinib + Netupitant-palonosetron Major
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 Netupitant-palonosetron with Siponimod?
MediHelp rates the interaction as moderate. Netupitant-palonosetron 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 is metabolized mainly by CYP2C9 with a smaller CYP3A4 contribution. Netupitant inhibits CYP3A4 moderately, which can raise siponimod exposure, especially in patients with reduced CYP2C9 activity. Higher siponimod levels increase the risk of bradycardia, infections and other adverse effects.
How serious is the interaction between Netupitant-palonosetron 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: Check the patient's CYP2C9 genotype or any other CYP2C9 inhibitors; siponimod labeling advises against combining with dual moderate CYP3A4/CYP2C9 inhibition. For a single short antiemetic course, monitor heart rate and adverse effects, or choose an alternative antiemetic.
What other medicines interact with Netupitant-palonosetron?
MediHelp also lists interactions of Netupitant-palonosetron with, for example, Apomorphine, Flibanserin, Apalutamide. The full list is on the Netupitant-palonosetron page.
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