I have had 2 back surgeries and also lost my right leg due to blood clots. I have severe pain in my back and my left leg holds all my weight now and in severe pain also my arms and shoulders the same I go up and down steps a lot. My dr. Has me on 80 mg oxycontin twice a day and 10mg percocet 4 times a day. He said something about going on opana. Should I do this and should I take 2 40mg twice a day and my percocet with it? I also have a very high tolerency to medicine what should I do? I may also lose my left leg and my knee is so so painful its not to bad getting up but when I go to sit down it feels like someone is stabbing me with a knife. It is so painful. I am in tears almost 24-7