After a patient begins warfarin, their INR will be checked often to determine their response to the drug. A patient's dose is determined once the INR falls within a specific therapeutic range.

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 ...

With approval of the ethics committee, data were prospectively collected for patients who received warfarin following heart valve replacement surgery from January 2003 to June 2004. Patients who ...