An oral anticoagulant that prevents blood clots by inhibiting vitamin K-dependent clotting factors. It requires regular blood monitoring (INR tests) and careful dose adjustments to balance clot prevention with bleeding risk.
Named after WARF (Wisconsin Alumni Research Foundation) where it was developed, plus the suffix '-arin' from coumarin, the chemical compound it's derived from. Originally discovered as rat poison in the 1940s before becoming a life-saving medication.
Warfarin started as rat poison and became one of medicine's most important drugs! It was initially used to kill rodents by causing fatal bleeding, but researchers realized that with careful dosing and monitoring, it could prevent deadly blood clots in humans without causing hemorrhage.
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