Warfarin
An oral anticoagulant that blocks vitamin K-dependent clotting factors.
Warfarin is an oral anticoagulant that blocks vitamin K–dependent clotting factors, used for long-term clot prevention. Monitor PT/INR, with a therapeutic INR typically 2–3, and keep vitamin K available as the antidote. Teach the client to keep vitamin-K intake consistent — avoiding sudden swings in leafy greens — since changes shift the INR and the drug interacts with many medications.
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