Does Coumadin have rat poison in it?
) is the active ingredient in rat poison. That being said, Coumadin is dosed, for humans, in a manner which prevents blood clotting (especially for those at risk), and
does not act as a poison at the therapeutic dosage level. (However, when rats ingest the high concentrations of warfarin
in rat poison, they bleed to death, internally.)"
A longer, better and
more precise answer is found on Wikipedia.