This page explains what happens if Aspirin and Warfarin are taken together, according to official sources.
Bleeding risk
Both thin the blood. Taken together, they significantly increase the risk of severe bleeding.
Avoid combination unless explicitly prescribed for specific indications (e.g. mechanical heart valves). Monitor INR closely and assess for occult bleeding.
Talk to your doctor or pharmacist about these two medicines; don't stop a prescribed medicine on your own.
Last updated: Sep 25, 2026
Before changing or stopping any medicine, ask your doctor or pharmacist. Never stop your medicine on your own.