The blood thinner warfarin, which prevents blood clots, owes its existence to some cows who got very sick after eating spoiled hay — and to a chemist who spent years trying to figure out why.

Mother Nature has provided a rich source of raw materials for a host of important drugs: aspirin comes from willow tree bark; the blood pressure drug captopril from the venom of a pit viper ...

From Rotten Clover. ... in rotted sweet clover (TIME, Feb. 14, 1944), ... Named warfarin,* it is usually applied to bait grain. Unsuspecting rats keep on eating it, ...

Sweet clover hay is the source of warfarin (Coumadin), another often-used anticoagulant in people with atrial fibrillation: This may be the source of confusion. However, warfarin needs to be dosed ...

Sweet clover hay is the source of warfarin (Coumadin), another often-used anticoagulant in people with atrial fibrillation: This may be the source of confusion. However, warfarin needs to be dosed ...

Sweet clover hay is the source of warfarin (Coumadin), another often-used anticoagulant in people with atrial fibrillation: This may be the source of confusion. However, warfarin needs to be dosed ...

I was making rounds at the hospital a few weeks ago with a cardiology friend and consultant. We were discussing which anticoagulant would be best suited for a patient that ...

Similarly, on the clotting factor side, a veterinarian in Wisconsin figured out in the 1920s that the cows who had abnormal bleeding had eaten sweet clover, and researchers at the University of ...