Drug interactions
Edoxaban + Nirmatrelvir / ritonavir
Severity: Major
Edoxaban and Nirmatrelvir / ritonavir: 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 inhibits P-gp and can raise edoxaban concentrations, increasing the risk of bleeding. The effect persists for some days after the antiviral course ends.
What this interaction means in plain words
Edoxaban and Nirmatrelvir / ritonavir 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 inhibits intestinal and renal P-glycoprotein, reducing edoxaban efflux and clearance.
What to do
Consider a temporary edoxaban dose reduction or switching to low molecular weight heparin during treatment, and monitor for bleeding. Resume the usual dose several days after the last antiviral dose.
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 Edoxaban
- Apixaban + Edoxaban Contraindicated
- Defibrotide + Edoxaban Contraindicated
- Edoxaban + Ketorolac Contraindicated
- Abciximab + Edoxaban Major
- Acetylsalicylic acid + Edoxaban Major
- Argatroban + Edoxaban Major
Frequently asked questions
Can I take Edoxaban with Nirmatrelvir / ritonavir?
MediHelp rates the interaction as major. Edoxaban and Nirmatrelvir / ritonavir 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 inhibits P-gp and can raise edoxaban concentrations, increasing the risk of bleeding. The effect persists for some days after the antiviral course ends.
How serious is the interaction between Edoxaban and Nirmatrelvir / ritonavir?
MediHelp rates it major, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Consider a temporary edoxaban dose reduction or switching to low molecular weight heparin during treatment, and monitor for bleeding. Resume the usual dose several days after the last antiviral dose.
What other medicines interact with Edoxaban?
MediHelp also lists interactions of Edoxaban with, for example, Apixaban, Defibrotide, Ketorolac. The full list is on the Edoxaban page.
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