Drug interactions
Ceritinib + Siponimod
Severity: Major
Ceritinib and Siponimod: major interaction.
Last updated Sources: US FDA label
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
Ceritinib inhibits CYP3A4 and CYP2C9 and may raise siponimod exposure, increasing risks such as bradyarrhythmia, infection and liver effects. Ceritinib also prolongs the QT interval and slows heart rate, adding to siponimod's cardiac effects.
What this interaction means in plain words
Ceritinib 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.
Ceritinib belongs to Oncology; Siponimod belongs to Central Nervous System.
Why it happens
Inhibition of CYP3A4 and CYP2C9 reduces siponimod clearance, with additive QT and heart-rate effects.
What to do
Avoid the combination if possible. If used, obtain a baseline ECG, monitor heart rate and QTc, and watch for siponimod adverse effects.
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?
Pro+ members
Unlock the full page
Create an account and start a Pro+ trial to unlock the full management advice for Ceritinib and Siponimod, the additional notes, the evidence detail and the whole-prescription interaction checker.
- Full clinical management advice
- Additional notes
- Evidence detail
- Interaction checker for a whole prescription
Try Pro+ free for 7 days on the web. No card needed.
References
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 Ceritinib
- Ceritinib + Cisapride Contraindicated
- Ceritinib + Eletriptan Contraindicated
- Ceritinib + Flibanserin Contraindicated
- Ceritinib + Pimozide Contraindicated
- Ceritinib + Thioridazine Contraindicated
- Ceritinib + Tolvaptan Contraindicated
Frequently asked questions
Can I take Ceritinib with Siponimod?
MediHelp rates the interaction as major. Ceritinib 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. Ceritinib inhibits CYP3A4 and CYP2C9 and may raise siponimod exposure, increasing risks such as bradyarrhythmia, infection and liver effects. Ceritinib also prolongs the QT interval and slows heart rate, adding to siponimod's cardiac effects.
How serious is the interaction between Ceritinib 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 if possible. If used, obtain a baseline ECG, monitor heart rate and QTc, and watch for siponimod adverse effects.
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.
Full monographs, dosing and an interaction checker in the MediHelp app
Open the complete reference, check multi-drug interactions and use dosing tools in the MediHelp app.
