b During this visit, the patient was prescribed prednisone 10 mg orally daily and his warfarin dosage was decreased to 9 mg weekly. c During this visit, the patient’s warfarin dosage was ...

To get the correct warfarin dose, patients have to have their INR tested. INR—international normalized ratio test—is a common blood test that determines how quickly your blood clots.

Half of the patients required a warfarin dose reduction and/or withheld dose, which further confirms the clinical relevance of this interaction. This INR increase was observed, on average ...

warfarin dose and vitamin K intake) and genetic factors (CYP2C9 and VKORC1 genotype). In addition, patients with severe CKD had much poorer anticoagulation control (that is, spent less time in the ...