Drug interactions
Ergotamine + Letermovir
Severity: Contraindicated
Ergotamine and Letermovir: 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
Letermovir can raise ergotamine exposure by inhibiting its CYP3A-mediated clearance. Higher ergotamine levels increase the risk of ergotism, with severe peripheral vasospasm and tissue ischemia.
What this interaction means in plain words
Ergotamine and Letermovir 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.
Ergotamine belongs to Central Nervous System; Letermovir belongs to Anti Virals.
Why it happens
Letermovir inhibits CYP3A4, reducing the metabolism of ergotamine.
What to do
Do not co-administer ergot alkaloids with letermovir; use a non-ergot agent for migraine during letermovir therapy.
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 Ergotamine
- Almotriptan + Ergotamine Contraindicated
- Atazanavir + Ergotamine Contraindicated
- Clarithromycin + Ergotamine Contraindicated
- Cobicistat + Ergotamine Contraindicated
- Darunavir + Ergotamine Contraindicated
- Dihydroergotamine intranasal + Ergotamine Contraindicated
Other interactions of Letermovir
- Letermovir + Pimozide Contraindicated
- Apalutamide + Letermovir Major
- Atorvastatin + Letermovir Major
- Carbamazepine + Letermovir Major
- Colchicine + Letermovir Major
- Cyclosporin + Letermovir Major
Frequently asked questions
Can I take Ergotamine with Letermovir?
MediHelp rates the interaction as contraindicated. Ergotamine and Letermovir 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. Letermovir can raise ergotamine exposure by inhibiting its CYP3A-mediated clearance. Higher ergotamine levels increase the risk of ergotism, with severe peripheral vasospasm and tissue ischemia.
How serious is the interaction between Ergotamine and Letermovir?
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 co-administer ergot alkaloids with letermovir; use a non-ergot agent for migraine during letermovir therapy.
What other medicines interact with Ergotamine?
MediHelp also lists interactions of Ergotamine with, for example, Almotriptan, Atazanavir, Clarithromycin. The full list is on the Ergotamine page.
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