Carol
Regarding your concern about Coumadin and rat poison: Coumadin (warfarin sodium) is very chemically similar to an ingredient used in rat poison. However, it is not poisonous to humans if dosed correctly. The effects it has on rats is simply that it causes them to bleed to death, but the dose is large compared to their body size. Coumadin is a very effective medication to decrease clot formation, but the key step is appropriate therapy. It is very important for you to follow through with blood work and report any signs of bleeding such as excessive bruising, blood in urine/stool etc. Hope this helps and puts your mind at ease.