Drug interactions
Fluconazole + Mavacamten
Severity: Contraindicated
Fluconazole 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
Mavacamten is cleared mainly by CYP2C19, with a contribution from CYP3A4, and fluconazole inhibits both enzymes. Higher mavacamten exposure can excessively reduce ejection fraction and cause heart failure from systolic dysfunction. Labeling contraindicates moderate to strong CYP2C19 inhibitors.
What this interaction means in plain words
Fluconazole 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.
Fluconazole belongs to Anti Fungals; Mavacamten belongs to Cardiovascular.
Why it happens
Fluconazole inhibits CYP2C19 and CYP3A4, reducing mavacamten clearance.
What to do
Do not combine them. If fluconazole is needed, interrupt mavacamten per labeling and monitor LVEF.
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 Fluconazole
- Dihydroergotamine intranasal + Fluconazole Contraindicated
- Dihydroergotamine + Fluconazole Contraindicated
- Dofetilide + Fluconazole Contraindicated
- Dronedarone + Fluconazole Contraindicated
- Erythromycin + Fluconazole Contraindicated
- Flibanserin + Fluconazole Contraindicated
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 Fluconazole with Mavacamten?
MediHelp rates the interaction as contraindicated. Fluconazole 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. Mavacamten is cleared mainly by CYP2C19, with a contribution from CYP3A4, and fluconazole inhibits both enzymes. Higher mavacamten exposure can excessively reduce ejection fraction and cause heart failure from systolic dysfunction. Labeling contraindicates moderate to strong CYP2C19 inhibitors.
How serious is the interaction between Fluconazole 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: Do not combine them. If fluconazole is needed, interrupt mavacamten per labeling and monitor LVEF.
What other medicines interact with Fluconazole?
MediHelp also lists interactions of Fluconazole with, for example, Dihydroergotamine intranasal, Dihydroergotamine, Dofetilide. The full list is on the Fluconazole page.
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