Diagnostics·Diagnostics
Preparing for INR
Informed by recognized medical guidance
Overview
INR stands for International Normalized Ratio. It is a blood test that measures how long it takes your blood to clot. Doctors use it to check if your blood is too thin or too thick, especially if you take medicine to prevent blood clots.
Key facts
- The INR test is often done regularly if you take blood-thinning medication.
- A normal INR is usually around 1.0, but your target range may be different based on your health condition.
- Preparation is simple: tell your doctor about all medicines and supplements you take.
Yes, millions of people around the world have regular INR tests to monitor their blood clotting.
It mainly affects people who take anticoagulant (blood-thinning) medicines, such as those with atrial fibrillation, deep vein thrombosis, pulmonary embolism, or mechanical heart valves.