Key facts about Mavacamten
What dosages is Mavacamten available in?
Mavacamten is available as a 2.5, 5, 10, or 15 mg immediate release capsule formulation.
What is Mavacamten used for?
Mavacamten is a cardiac myosin inhibitor.
How does Mavacamten work?
Mavacamten works by blocking the activity of a certain protein that is involved in helping the heart muscle contract. Therefore, by blocking the protein, Mavacamten relaxes the heart muscle.
How do I take Mavacamten?
Mavacamten is prescribed to be taken once a day, swalloed whole. Before you are first prescribed Mavacamten, your healthcare provider will do an echocardiogram (echo) to assess your obstructive HCM.
Is it safe for me to take Mavacamten?
Mavacamten is a safe and effective treatment when used for FDA-licensed indications. However, like all medications, they may give you unwanted side effects. You should always discuss potential side effects with your physician to ensure the medication is suitable and right for you.
Mavacamten Common Side Effects
Common side effects of Mavacamten include:
- Dizziness
- Fainting (syncope)
Mavacamten Serious Side Effects
Serious side effects are rare with Mavacamten. However, If you do notice symptoms of shortness of breath, chest pain, fatigue
racing heart (palpitations), leg swelling, rapid weight gain then you should contact your physician as a matter of urgency. This could be a sign of heart failure (a condition where the heart cannot pump with enough force).
Effects of other drugs, drug classes and over-the-counter products on Mavacamten
The following medications may interact with Mavacamten:
- Apalutamide
- Aprepitant
- Antifungals (e.g., fluconazole, itraconazole, ketoconazole)
- Beta-adrenergic blockers (e.g., atenolol, propranolol, sotalol)
- Bosentan
- Cannabidiol
- Cimetidine.
Who makes Mavacamten?
Various FDA-approved generic manufacturers
Is Mavacamten safe in pregnancy?
Animal studies have shown there is risk to the foetus. Mavacamten is therefore contraindicated during pregnancy and in women of childbearing potential not using effective contraception.













