Drug interactions
Dexamethasone + Macitentan
Severity: Moderate
Dexamethasone and Macitentan: moderate 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
Dexamethasone may induce CYP3A4 and lower macitentan concentrations, potentially reducing control of pulmonary arterial hypertension. The effect is weaker than with strong inducers such as rifampin.
What this interaction means in plain words
Dexamethasone and Macitentan can affect each other. The combination is often manageable, but it may need a change of dose, a change of timing, or extra checks while both are taken.
Dexamethasone belongs to Endocrine; Macitentan belongs to Cardiovascular.
Why it happens
Dexamethasone induces CYP3A4, increasing macitentan metabolism.
What to do
Monitor symptoms and functional status during prolonged dexamethasone therapy and avoid strong inducers; use the shortest effective steroid course.
What to ask your pharmacist
- Should I take them at different times of day?
- Does the dose of either medicine need to change?
- Is there anything I should avoid, such as alcohol or certain foods, while on both?
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Other interactions of Dexamethasone
- Bcg vaccine live + Dexamethasone Contraindicated
- Dexamethasone + Mifepristone Contraindicated
- Dexamethasone + Rilpivirine Contraindicated
- Dexamethasone + Smallpox vaccine live Contraindicated
- Dexamethasone + Varicella virus vaccine live Contraindicated
- Dexamethasone + Yellow fever vaccine Contraindicated
Other interactions of Macitentan
- Amiodarone + Macitentan Major
- Apalutamide + Macitentan Major
- Bosentan + Macitentan Major
- Carbamazepine + Macitentan Major
- Clarithromycin + Macitentan Major
- Efavirenz + Macitentan Major
Frequently asked questions
Can I take Dexamethasone with Macitentan?
MediHelp rates the interaction as moderate. Dexamethasone and Macitentan can affect each other. The combination is often manageable, but it may need a change of dose, a change of timing, or extra checks while both are taken. Dexamethasone may induce CYP3A4 and lower macitentan concentrations, potentially reducing control of pulmonary arterial hypertension. The effect is weaker than with strong inducers such as rifampin.
How serious is the interaction between Dexamethasone and Macitentan?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Monitor symptoms and functional status during prolonged dexamethasone therapy and avoid strong inducers; use the shortest effective steroid course.
What other medicines interact with Dexamethasone?
MediHelp also lists interactions of Dexamethasone with, for example, Bcg vaccine live, Mifepristone, Rilpivirine. The full list is on the Dexamethasone page.
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