Kim, don't worry about it. You gave me enough links to read for the next two weeks. His problem is the pain in the knee is not that bad and he would like to cut down on the vicodin. He takes 3-4 725mg a day. But, he is taking them more for the back pain. While he is getting the epidoral injections, he cannot take anything with asprin in it, so, again, he is stuck in the middle, no OTC stuff. He needs something for the back pain (until hopefully these injections kick in), but in the meantime the vicodin is giving him bad anxiety. Oh, what to do.