A patient with atrial fibrillation is taking warfarin (Coumadin) and has an international normalized ratio (INR) of 4.0 with no active bleeding. How should the clinician manage this patient?
A. Stop the medication for 1 week, and then repeat the INR.
B. Withhold 1 or more days of anticoagulant therapy.
C. Restart therapy at a lower dose immediately.
D. Slowly increase the dose over 3 days.



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