PT-INR Test for 1 parameters PT-INR stands for Prothrombin Time – International Normalized Ratio. It is a laboratory test used to measure the clotting ability of blood and to monitor the effectiveness of anticoagulant medications such as warfarin (Coumadin). Plasma No Fasting Required ₹330Free home sample Book Test Free home sample collection in 60 mins Reports within 3 Hours 10,00,000+Tests done TrustedDoctors 10,00,000+Certified Labs 10,00,000+Pickup-at-home Gallery-