Rats and mice can't resist the flavor and highly palatable formulation of FINAL Rodenticide, made with more than 16 human food-grade ingredients for unsurpassed acceptance and control. Final is the preferred bait of rats and mice when tested against other Brodifacoum baits on the market. The active ingredient brodifacoum is an anticoagulant, meaning that when it is ingested, the poison is transferred from the digestive system to the bloodstream where it hinders clotting, causing eventual death.