Drug interactions
Nirmatrelvir / ritonavir + Rimegepant
Severity: Major
Nirmatrelvir / ritonavir and Rimegepant: major 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 P-glycoprotein, which can substantially increase rimegepant exposure. This raises the risk of adverse effects.
What this interaction means in plain words
Nirmatrelvir / ritonavir and Rimegepant can interact in a way that may be serious. Using them together is sometimes necessary, but it needs a deliberate decision by the prescriber, a plan for monitoring, and clear advice on the warning signs to watch for.
Why it happens
Ritonavir inhibition of CYP3A4 and P-glycoprotein reduces rimegepant clearance.
What to do
Avoid rimegepant during the nirmatrelvir/ritonavir course and for a few days afterward; use another migraine therapy.
What to ask your pharmacist
- Does the benefit of taking both outweigh the risk in my case?
- Do I need any blood test, ECG or other check while on both?
- What early warning signs should I watch for, and what should I do if they appear?
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Other interactions of Rimegepant
Frequently asked questions
Can I take Nirmatrelvir / ritonavir with Rimegepant?
MediHelp rates the interaction as major. Nirmatrelvir / ritonavir and Rimegepant can interact in a way that may be serious. Using them together is sometimes necessary, but it needs a deliberate decision by the prescriber, a plan for monitoring, and clear advice on the warning signs to watch for. Ritonavir strongly inhibits CYP3A4 and P-glycoprotein, which can substantially increase rimegepant exposure. This raises the risk of adverse effects.
How serious is the interaction between Nirmatrelvir / ritonavir and Rimegepant?
MediHelp rates it major, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Avoid rimegepant during the nirmatrelvir/ritonavir course and for a few days afterward; use another migraine therapy.
What other medicines interact with Rimegepant?
MediHelp also lists interactions of Rimegepant with, for example, Amobarbital, Atazanavir, Butabarbital. The full list is on the Rimegepant page.
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