This page explains what happens if Ciprofloxacin and Warfarin are taken together, according to official sources.
Increased warfarin effect
Ciprofloxacin strengthens warfarin effect and elevates INR levels, increasing bleeding risk.
Recheck INR within 48-72 hours of antibiotic initiation. Warfarin dose reduction (typically 25-50%) is routinely required under physician guidance.
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.