Anticoagulation variability is highest in the first few months after initiation of warfarin. In one study, only 29% of patient days were within the recommended INR range of 3-4.5 in the first 3 ...

a Patient had a surgical procedure in April for which his warfarin was discontinued for five days. b During this visit, the patient was prescribed prednisone 10 mg orally daily and his warfarin ...

Currently, anticoagulation with warfarin is generally prescribed ... spent less time in the international normalized ratio [INR] target range) and a much higher risk of excessive anticoagulation ...