Which INR value is considered normal?

An International Normalized Ratio (INR) of 1 is considered normal for most individuals who are not on anticoagulant therapy. The INR is a standardized measure of blood coagulation and is primarily used to monitor patients on anticoagulant medications, such as warfarin, to ensure they maintain a safe level of anticoagulation therapy.

A normal INR of around 1 indicates that the patient has normal clotting function and that their blood is neither too thick nor too thin. Values above the normal range suggest an increased risk of bleeding due to slower clotting, while values below the normal range indicate a higher risk of clot formation.

In contrast, an INR of 3 or higher is typically targeted for patients on anticoagulation therapy; however, these values would not be normal for patients not on such treatment. Therefore, for a healthy individual or someone not requiring anticoagulation, an INR of 1 is the expected and normal value.