My Doctor put me on this last night because my muscles all down my right side are what makes my back hurt.I had a wonderful nights sleep for the first time in months if not years.What affects have any of you had? I thank God ,I think I have found a good Doctor after 7 long years and so much frustration. He is sending me to a pain clinic and also to physical med clinic. The second is where the Doctors will help me to rehabilitate after I get control of my pain. Things like acupuncture and other things that are different.