Drug interactions
Ivabradine + Siponimod
Severity: Major
Ivabradine 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 lower heart rate, and siponimod causes transient bradycardia and atrioventricular conduction delay at treatment initiation. Combined use may produce additive symptomatic bradycardia or conduction block. Siponimod labeling advises against starting it with heart-rate-lowering drugs without specialist input.
What this interaction means in plain words
Ivabradine 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.
Ivabradine belongs to Cardiovascular; Siponimod belongs to Central Nervous System.
Why it happens
Additive pharmacodynamic bradycardic effects: ivabradine inhibits the sinus node If current while siponimod activates S1P receptors on atrial myocytes.
What to do
Obtain cardiology input before starting siponimod and consider an alternative to ivabradine. If combined, perform first-dose ECG and heart rate monitoring.
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 Ivabradine
- Atazanavir + Ivabradine Contraindicated
- Clarithromycin + Ivabradine Contraindicated
- Cobicistat + Ivabradine Contraindicated
- Conivaptan + Ivabradine Contraindicated
- Darunavir + Ivabradine Contraindicated
- Diltiazem + Ivabradine 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 Ivabradine with Siponimod?
MediHelp rates the interaction as major. Ivabradine 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 lower heart rate, and siponimod causes transient bradycardia and atrioventricular conduction delay at treatment initiation. Combined use may produce additive symptomatic bradycardia or conduction block. Siponimod labeling advises against starting it with heart-rate-lowering drugs without specialist input.
How serious is the interaction between Ivabradine 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 cardiology input before starting siponimod and consider an alternative to ivabradine. If combined, perform first-dose ECG and heart rate monitoring.
What other medicines interact with Ivabradine?
MediHelp also lists interactions of Ivabradine with, for example, Atazanavir, Clarithromycin, Cobicistat. The full list is on the Ivabradine page.
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