Drug interactions
Romidepsin + Siponimod
Severity: Major
Romidepsin 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
Romidepsin can prolong the QT interval and siponimod lowers heart rate. Together they increase the risk of ventricular arrhythmia.
What this interaction means in plain words
Romidepsin 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 QT prolongation with siponimod-induced bradycardia.
What to do
Obtain a baseline ECG and monitor it, and correct potassium and magnesium. Seek cardiology advice before starting siponimod.
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 Romidepsin with Siponimod?
MediHelp rates the interaction as major. Romidepsin 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. Romidepsin can prolong the QT interval and siponimod lowers heart rate. Together they increase the risk of ventricular arrhythmia.
How serious is the interaction between Romidepsin 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 and monitor it, and correct potassium and magnesium. Seek cardiology advice before starting siponimod.
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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