Tramadol
"Tramadol would MILDLY work for my back and knee pain for about a week and then stop.  Oxycodone works best for me and hydrocodone is second.  If it works for your pain, great but my experience is that it does nothing more than ibuprofen or other OTC pain relievers in the long run.  The physical withdrawal from tramadol in my opinion is worse than hydrocodone or oxycodone due to the dual action it has on the brain."