Warfarin Dosage
Initial dose (loading dose) would be 5 mg/day for 3 to 5 days. For rapid anticoagulation effect, 10 mg/day for 2 days. After INR value is obtained, warfarin dose should be adjusted based on the INR or prothrombin time. Usual maintenance dose would be 2-10 mg daily depending on INR. Lower initial dose should be given to elderly patient, or to the patient concurrently taking medications / supplement that would increase INR value.
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