Drug interactions
Betaxolol + Mavacamten
Severity: Major
Betaxolol and Mavacamten: 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
Mavacamten reduces cardiac contractility and betaxolol adds negative inotropic and chronotropic effects, which may contribute to systolic dysfunction and heart failure.
What this interaction means in plain words
Betaxolol and Mavacamten 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.
Betaxolol belongs to Cardiovascular; Mavacamten belongs to Cardiovascular.
Why it happens
Additive negative inotropic effects via myosin inhibition and beta-adrenergic blockade.
What to do
Monitor LVEF with echocardiography per mavacamten labeling and watch for heart failure symptoms. Interrupt mavacamten if systolic function declines.
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?
Pro+ members
Unlock the full page
Create an account and start a Pro+ trial to unlock the full management advice for Betaxolol and Mavacamten, the additional notes, the evidence detail and the whole-prescription interaction checker.
- Full clinical management advice
- Additional notes
- Evidence detail
- Interaction checker for a whole prescription
Try Pro+ free for 7 days on the web. No card needed.
Other interactions of Betaxolol
- Acebutolol + Betaxolol Major
- Aldesleukin + Betaxolol Major
- Amifostine + Betaxolol Major
- Amiodarone + Betaxolol Major
- Atenolol-chlorthalidone + Betaxolol Major
- Atenolol + Betaxolol Major
Other interactions of Mavacamten
- Apalutamide + Mavacamten Contraindicated
- Carbamazepine + Mavacamten Contraindicated
- Clarithromycin + Mavacamten Contraindicated
- Dexlansoprazole + Mavacamten Contraindicated
- Efavirenz + Mavacamten Contraindicated
- Enzalutamide + Mavacamten Contraindicated
Frequently asked questions
Can I take Betaxolol with Mavacamten?
MediHelp rates the interaction as major. Betaxolol and Mavacamten 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. Mavacamten reduces cardiac contractility and betaxolol adds negative inotropic and chronotropic effects, which may contribute to systolic dysfunction and heart failure.
How serious is the interaction between Betaxolol and Mavacamten?
MediHelp rates it major, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Monitor LVEF with echocardiography per mavacamten labeling and watch for heart failure symptoms. Interrupt mavacamten if systolic function declines.
What other medicines interact with Betaxolol?
MediHelp also lists interactions of Betaxolol with, for example, Acebutolol, Aldesleukin, Amifostine. The full list is on the Betaxolol page.
Full monographs, dosing and an interaction checker in the MediHelp app
Open the complete reference, check multi-drug interactions and use dosing tools in the MediHelp app.
