Drug interactions
Ranolazine + Siponimod
Severity: Major
Ranolazine 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
Siponimod can cause bradycardia and QT prolongation, and ranolazine also prolongs QT. Together they may increase the risk of ventricular arrhythmia.
What this interaction means in plain words
Ranolazine 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.
Ranolazine belongs to Cardiovascular; Siponimod belongs to Central Nervous System.
Why it happens
Additive QT prolongation, with siponimod-induced bradycardia increasing proarrhythmic risk.
What to do
Obtain an ECG before starting siponimod and consider cardiology advice. Avoid the combination if possible, or monitor ECG and electrolytes.
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 Ranolazine
- Adagrasib + Ranolazine Contraindicated
- Amobarbital + Ranolazine Contraindicated
- Apalutamide + Ranolazine Contraindicated
- Butabarbital + Ranolazine Contraindicated
- Carbamazepine + Ranolazine Contraindicated
- Clarithromycin + Ranolazine Contraindicated
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 Ranolazine with Siponimod?
MediHelp rates the interaction as major. Ranolazine 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. Siponimod can cause bradycardia and QT prolongation, and ranolazine also prolongs QT. Together they may increase the risk of ventricular arrhythmia.
How serious is the interaction between Ranolazine 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 an ECG before starting siponimod and consider cardiology advice. Avoid the combination if possible, or monitor ECG and electrolytes.
What other medicines interact with Ranolazine?
MediHelp also lists interactions of Ranolazine with, for example, Adagrasib, Amobarbital, Apalutamide. The full list is on the Ranolazine page.
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