Drug interactions
Ponesimod + Timolol
Severity: Major
Ponesimod and Timolol: 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
Ponesimod causes transient heart rate reduction and can delay atrioventricular conduction when started, and a beta-blocker may increase the risk of significant bradycardia. Systemic timolol exposure from eye drops is smaller but can still matter.
What this interaction means in plain words
Ponesimod and Timolol 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.
Ponesimod belongs to Central Nervous System; Timolol belongs to Cardiovascular.
Why it happens
Additive negative chronotropic and dromotropic effects from S1P receptor modulation and beta-adrenergic blockade.
What to do
Check resting heart rate before starting ponesimod in patients taking a beta-blocker and use the labeled titration, with cardiology input if the heart rate is low. Monitor heart rate and ECG after initiation.
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 Timolol
- Acebutolol + Timolol Major
- Albuterol + Timolol Major
- Aldesleukin + Timolol Major
- Amifostine + Timolol Major
- Amiodarone + Timolol Major
- Arformoterol + Timolol Major
Other interactions of Ponesimod
- Fingolimod + Ponesimod Contraindicated
- Ponesimod + Siponimod Contraindicated
- Amiodarone + Ponesimod Major
- Amisulpride + Ponesimod Major
- Anagrelide + Ponesimod Major
- Anti-thymocyte + Ponesimod Major
Frequently asked questions
Can I take Ponesimod with Timolol?
MediHelp rates the interaction as major. Ponesimod and Timolol 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. Ponesimod causes transient heart rate reduction and can delay atrioventricular conduction when started, and a beta-blocker may increase the risk of significant bradycardia. Systemic timolol exposure from eye drops is smaller but can still matter.
How serious is the interaction between Ponesimod and Timolol?
MediHelp rates it major, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Check resting heart rate before starting ponesimod in patients taking a beta-blocker and use the labeled titration, with cardiology input if the heart rate is low. Monitor heart rate and ECG after initiation.
What other medicines interact with Timolol?
MediHelp also lists interactions of Timolol with, for example, Acebutolol, Albuterol, Aldesleukin. The full list is on the Timolol page.
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