Does Azathioprine Interact With Warfarin?

Use with Warfarin Azathioprine tablets may inhibit the anticoagulant effect of warfarin.

Severity: Minor

Severity basis: drug interactions section. Combining Azathioprine (Immunosuppressant) and Warfarin (Vitamin K antagonist anticoagulant) is classified as a minor interaction.

What to Do

This is generally a minor interaction, but review it with your pharmacist to be sure it is safe for you.

From the FDA Label

Use with Warfarin Azathioprine tablets may inhibit the anticoagulant effect of warfarin.

Source: FDA structured product labeling (set_id 040d010a-b1b2-4db7-905d-8aa7f1bab0cd).

Azathioprine

Immunosuppressant

Brands: Imuran, Azasan

View Azathioprine safety profile

Warfarin

Vitamin K antagonist anticoagulant

Brands: Coumadin, Jantoven

View Warfarin safety profile

Check these against your full medication list in our free Interaction Checker

This information is educational — not medical advice.

This page is provided for general educational purposes and summarizes publicly available data from sources such as the U.S. Food & Drug Administration. It is not a substitute for the judgment of a licensed clinician and should not be used to start, stop, or change any medication. It may be incomplete or out of date, and individual circumstances vary. Always talk with your prescriber or pharmacist about your specific medications and health conditions. If you think you may have a medical emergency, call 911.

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