160 EGP
- Test code
- PT-INR
- Sample type
- Blood sample
- Fasting
- No fasting needed
- Result time
- Within 4 hours
- Home sampling
- Available
- Reference range
- INR 0.8 – 1.2 (no blood thinners)
Prothrombin time measures how long blood takes to clot; INR expresses the same result on a standard scale shared by all labs.
People on warfarin test it regularly — the target is often between 2 and 3 depending on the condition. Doctors also order it before surgery and to follow liver function.
Preparation before the test
- Take your warfarin dose at the usual time and note when you took the last one.
- Tell the lab about the medicines you take.
This information is for awareness only and is not a substitute for medical advice — your treating doctor interprets the result for your case.
