What parameter should be monitored when a patient is on anticoagulant therapy?

Monitoring the International Normalized Ratio (INR) is essential for patients on anticoagulant therapy because it provides a standardized measurement of the time it takes for blood to clot. Anticoagulants, such as warfarin, are prescribed to reduce the likelihood of blood clots forming, which can lead to serious conditions like stroke or deep vein thrombosis. The INR is crucial for managing the dosage of anticoagulants; it helps ensure that the blood's clotting ability remains within a therapeutic range that minimizes the risks of thrombosis and excessive bleeding.

The INR test evaluates the coagulation status and guides healthcare providers in making necessary adjustments to the anticoagulant dosage, ensuring effective and safe therapy for the patient.