Tramadol
"Takes care of my chronic knee pain. Due to cancer, I am not a candidate for a replacement at this time, though I am need of them. Tramadol keeps me from suffering. I usually take 2 daily, prescription is for 4 daily. I up it to three if I have a day where I am very active. Everything has side effects and I can live with Tramadol. I like that I can drive and go to work while taking it."