This page explains what happens if Amoxicillin and Warfarin are taken together, according to official sources.
Potential INR elevation
Antibiotics can alter the effect of warfarin. INR should be monitored during treatment.
Check INR within 3 to 5 days of starting antibiotic. Keep dietary vitamin K intake consistent.
Last updated: Sep 25, 2026
Before changing or stopping any medicine, ask your doctor or pharmacist. Never stop your medicine on your own.