Does Lansoprazole Interact With Warfarin?

Warfarin Clinical Impact: Increased INR and prothrombin time in patients receiving PPIs and warfarin concomitantly.

Severity: Minor

Severity basis: drug interactions section. Combining Lansoprazole (Proton pump inhibitor) 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

Warfarin Clinical Impact: Increased INR and prothrombin time in patients receiving PPIs and warfarin concomitantly.

Source: FDA structured product labeling (set_id 00a574e0-bd03-deea-9f85-b108f78982ba).

Lansoprazole

Proton pump inhibitor

Brands: Prevacid

View Lansoprazole 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 It may be incomplete or out of date, and individual circumstances vary.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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