Which range best represents a typical therapeutic INR for many indications?

Which range best represents a typical therapeutic INR for many indications?

• A. 0.8 to 1.2
• B. 2.0 to 3.0
• C. 3.0 to 4.0
• D. 1.0 to 2.0

Answer: (B)

INR targets guide how aggressively to anticoagulate with warfarin. The International Normalized Ratio standardizes prothrombin time across labs, so clinicians aim for a defined window that balances preventing clots with the risk of bleeding. For many indications treated with warfarin, such as atrial fibrillation or venous thromboembolism, the goal is to keep the INR in a range that provides effective anticoagulation without excessive bleeding risk. That typical therapeutic window is about 2.0 to 3.0. Values in this range have shown good protection against thromboembolism while maintaining a manageable bleeding risk. Near-normal INR values (around 0.8 to 1.2) indicate little or no anticoagulation, while higher ranges (3.0 to 4.0 and above) are used in specific situations and carry greater bleeding risk. So, 2.0 to 3.0 best represents the typical therapeutic INR for many indications.

INR targets guide how aggressively to anticoagulate with warfarin. The International Normalized Ratio standardizes prothrombin time across labs, so clinicians aim for a defined window that balances preventing clots with the risk of bleeding. For many indications treated with warfarin, such as atrial fibrillation or venous thromboembolism, the goal is to keep the INR in a range that provides effective anticoagulation without excessive bleeding risk. That typical therapeutic window is about 2.0 to 3.0. Values in this range have shown good protection against thromboembolism while maintaining a manageable bleeding risk. Near-normal INR values (around 0.8 to 1.2) indicate little or no anticoagulation, while higher ranges (3.0 to 4.0 and above) are used in specific situations and carry greater bleeding risk. So, 2.0 to 3.0 best represents the typical therapeutic INR for many indications.