Drug interactions
Midostaurin + Siponimod
Severity: Major
Midostaurin 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
Both drugs may prolong the QT interval, and siponimod may cause bradycardia, increasing the risk of serious ventricular arrhythmia.
What this interaction means in plain words
Midostaurin 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.
Midostaurin belongs to Oncology; Siponimod belongs to Central Nervous System.
Why it happens
Additive QT prolongation with siponimod-related bradycardia.
What to do
Obtain a baseline ECG, correct electrolytes, and monitor QTc during therapy. Consider alternatives if QTc becomes prolonged.
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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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 Midostaurin
Frequently asked questions
Can I take Midostaurin with Siponimod?
MediHelp rates the interaction as major. Midostaurin 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. Both drugs may prolong the QT interval, and siponimod may cause bradycardia, increasing the risk of serious ventricular arrhythmia.
How serious is the interaction between Midostaurin 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: Obtain a baseline ECG, correct electrolytes, and monitor QTc during therapy. Consider alternatives if QTc becomes prolonged.
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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