In a message dated 7/6/2015 5:06:33 P.M. Eastern Daylight Time, jay.weigel at gmail.com writes: I did know this. I hate the stuff and hope never to go on it....EVER. Rat poison *shudder*>>>> It is a drug that has gone generic, but according to several large users, is not dependable in any but it's brand name, "Coumadin." David Strang.