Drug interactions
Carbamazepine + Mavacamten
Severity: Contraindicated
Carbamazepine and Mavacamten: contraindicated 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
Carbamazepine markedly reduces mavacamten exposure, which may cause loss of efficacy in obstructive hypertrophic cardiomyopathy. Stopping the inducer later could also cause mavacamten levels to rise unexpectedly.
What this interaction means in plain words
Carbamazepine and Mavacamten are not normally used together. Taking them at the same time is expected to cause harm or make one of them unsafe, so a different medicine is usually chosen for one of the two.
Carbamazepine belongs to Central Nervous System; Mavacamten belongs to Cardiovascular.
Why it happens
Carbamazepine induces CYP2C19 and CYP3A4, the main enzymes clearing mavacamten.
What to do
Avoid the combination as labeled. If an inducer is stopped or started, reassess LVEF and gradients and adjust mavacamten dose by echocardiography.
What to ask your pharmacist
- Is there an alternative to one of these two medicines for me?
- If both are essential, who is monitoring me and how often?
- Which symptoms mean I should stop and seek help straight away?
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Other interactions of Carbamazepine
- Artemether / lumefantrine + Carbamazepine Contraindicated
- Cabotegravir + Carbamazepine Contraindicated
- Carbamazepine + Delamanid Contraindicated
- Carbamazepine + Dienogest / estradiol valerate Contraindicated
- Carbamazepine + Doravirine Contraindicated
- Carbamazepine + Elbasvir / grazoprevir Contraindicated
Other interactions of Mavacamten
- Apalutamide + Mavacamten Contraindicated
- Clarithromycin + Mavacamten Contraindicated
- Dexlansoprazole + Mavacamten Contraindicated
- Efavirenz + Mavacamten Contraindicated
- Enzalutamide + Mavacamten Contraindicated
- Eslicarbazepine + Mavacamten Contraindicated
Frequently asked questions
Can I take Carbamazepine with Mavacamten?
MediHelp rates the interaction as contraindicated. Carbamazepine and Mavacamten are not normally used together. Taking them at the same time is expected to cause harm or make one of them unsafe, so a different medicine is usually chosen for one of the two. Carbamazepine markedly reduces mavacamten exposure, which may cause loss of efficacy in obstructive hypertrophic cardiomyopathy. Stopping the inducer later could also cause mavacamten levels to rise unexpectedly.
How serious is the interaction between Carbamazepine and Mavacamten?
MediHelp rates it contraindicated, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Avoid the combination as labeled. If an inducer is stopped or started, reassess LVEF and gradients and adjust mavacamten dose by echocardiography.
What other medicines interact with Carbamazepine?
MediHelp also lists interactions of Carbamazepine with, for example, Artemether / lumefantrine, Cabotegravir, Delamanid. The full list is on the Carbamazepine page.
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