Nirmatrelvir Ritonavir and Rivaroxaban: Drug Interaction Guide
Quick answer: This is a major interaction — avoid combining Nirmatrelvir Ritonavir and Rivaroxaban unless specifically directed by your doctor.
How Nirmatrelvir Ritonavir interacts with Rivaroxaban
Ritonavir strongly inhibits CYP3A4 and P-glycoprotein, increasing rivaroxaban exposure. This substantially increases bleeding risk.
What you should do
Avoid coadministration; temporarily use an alternative COVID-19 therapy or an alternative anticoagulation plan.
Key facts
Severity
Major — avoid combination
Mechanism
Ritonavir strongly inhibits CYP3A4 and P-glycoprotein, increasing rivaroxaban exposure. This substantially increases ble...
Action
Avoid coadministration; temporarily use an alternative COVID-19 therapy or an alternative anticoagulation plan.
Frequently asked questions
Can I take Nirmatrelvir Ritonavir and Rivaroxaban together?
No — this combination should generally be avoided. Avoid coadministration; temporarily use an alternative COVID-19 therapy or an alternative anticoagulation plan.
What is the severity of this interaction?
The interaction between Nirmatrelvir Ritonavir and Rivaroxaban is classified as Major — avoid combination. Ritonavir strongly inhibits CYP3A4 and P-glycoprotein, increasing rivaroxaban exposure. This substantially increases bleeding risk.
What should I do if I'm prescribed both?
Avoid coadministration; temporarily use an alternative COVID-19 therapy or an alternative anticoagulation plan. Always consult your prescribing clinician — do not stop or change medications without medical guidance.
Last reviewed: by iMedic Medical Editorial Team. Our editorial process.