Drug interactions
Eletriptan + Nirmatrelvir / ritonavir
Severity: Contraindicated
Eletriptan and Nirmatrelvir / ritonavir: 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
Ritonavir strongly inhibits CYP3A4 and substantially raises eletriptan concentrations, which may cause serious vasoconstrictive cardiovascular and cerebrovascular events. Inhibition persists for days after the course ends.
What this interaction means in plain words
Eletriptan and Nirmatrelvir / ritonavir 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.
Why it happens
Ritonavir-mediated strong CYP3A4 inhibition reduces the metabolism of eletriptan.
What to do
Do not use eletriptan during nirmatrelvir/ritonavir treatment or for at least 72 hours after the last dose. Use a non-CYP3A4-dependent triptan or another migraine therapy during that time.
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 Eletriptan
- Almotriptan + Eletriptan Contraindicated
- Atazanavir + Eletriptan Contraindicated
- Ceritinib + Eletriptan Contraindicated
- Clarithromycin + Eletriptan Contraindicated
- Cobicistat + Eletriptan Contraindicated
- Conivaptan + Eletriptan Contraindicated
Frequently asked questions
Can I take Eletriptan with Nirmatrelvir / ritonavir?
MediHelp rates the interaction as contraindicated. Eletriptan and Nirmatrelvir / ritonavir 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. Ritonavir strongly inhibits CYP3A4 and substantially raises eletriptan concentrations, which may cause serious vasoconstrictive cardiovascular and cerebrovascular events. Inhibition persists for days after the course ends.
How serious is the interaction between Eletriptan and Nirmatrelvir / ritonavir?
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 use eletriptan during nirmatrelvir/ritonavir treatment or for at least 72 hours after the last dose. Use a non-CYP3A4-dependent triptan or another migraine therapy during that time.
What other medicines interact with Eletriptan?
MediHelp also lists interactions of Eletriptan with, for example, Almotriptan, Atazanavir, Ceritinib. The full list is on the Eletriptan page.
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