Drug interactions
Formoterol-mometasone + Letermovir
Severity: Minor
Formoterol-mometasone and Letermovir: minor 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
Letermovir moderately inhibits CYP3A4 and may raise mometasone exposure. Higher systemic corticosteroid levels could cause adrenal suppression with prolonged use.
What this interaction means in plain words
Formoterol-mometasone and Letermovir have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised.
Formoterol-mometasone belongs to Respiratory; Letermovir belongs to Anti Virals.
Why it happens
Inhibition of CYP3A4 mediated mometasone metabolism.
What to do
Monitor for signs of corticosteroid excess if used long term. Usually no dose change is needed for short courses.
What to ask your pharmacist
- Is there anything I should notice while taking both?
- Do I need to tell my doctor at the next visit?
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Other interactions of Formoterol-mometasone
Other interactions of Letermovir
- Ergotamine + Letermovir Contraindicated
- Letermovir + Pimozide Contraindicated
- Apalutamide + Letermovir Major
- Atorvastatin + Letermovir Major
- Carbamazepine + Letermovir Major
- Colchicine + Letermovir Major
Frequently asked questions
Can I take Formoterol-mometasone with Letermovir?
MediHelp rates the interaction as minor. Formoterol-mometasone and Letermovir have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised. Letermovir moderately inhibits CYP3A4 and may raise mometasone exposure. Higher systemic corticosteroid levels could cause adrenal suppression with prolonged use.
How serious is the interaction between Formoterol-mometasone and Letermovir?
MediHelp rates it minor, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Monitor for signs of corticosteroid excess if used long term. Usually no dose change is needed for short courses.
What other medicines interact with Formoterol-mometasone?
MediHelp also lists interactions of Formoterol-mometasone with, for example, Amiodarone, Amisulpride, Amoxapine. The full list is on the Formoterol-mometasone page.
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