Drug interactions
Dabrafenib + Siponimod
Severity: Major
Dabrafenib 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
Dabrafenib is a moderate CYP3A4 and CYP2C9 inducer and can lower siponimod exposure, possibly reducing efficacy. The risk is higher in CYP2C9*1/*3 and *2/*3 genotypes.
What this interaction means in plain words
Dabrafenib 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.
Dabrafenib belongs to Oncology; Siponimod belongs to Central Nervous System.
Why it happens
Induction of CYP3A4 and CYP2C9 accelerates siponimod metabolism.
What to do
Avoid the combination, particularly in CYP2C9*1/*3 and *2/*3 patients; otherwise monitor for loss of MS control.
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 Dabrafenib
Frequently asked questions
Can I take Dabrafenib with Siponimod?
MediHelp rates the interaction as major. Dabrafenib 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. Dabrafenib is a moderate CYP3A4 and CYP2C9 inducer and can lower siponimod exposure, possibly reducing efficacy. The risk is higher in CYP2C9*1/*3 and *2/*3 genotypes.
How serious is the interaction between Dabrafenib 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, particularly in CYP2C9*1/*3 and *2/*3 patients; otherwise monitor for loss of MS control.
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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