Does anyone have a personal experience with..?

prescription narcotic pain-killers? I have severely arthritic knees, bad enough to be collecting disability income. I had kidney stones last week and was given IV morphine, which not only eased the pain from the stones, but my knee pain was virtually eliminated. Thought I'd ask you guys before I saw the doc. I've heard about fetynyl patches, oxycontin etc. Any recommendations? (I worry about addiction though.)