muscle spasm
"I have had problems with arthritis and degenerative disc disease in my back and neck for over 18 years and have had to use muscle relaxers often.  I have tried Tizanidine, Robaxin, Skelexin and now Soma.  My new rheumatologist prescribed it and I feel it works the best out of all the muscle relaxers I have tried.  I don't seem to have any side effects to speak of. I need four orthopedic surgeries and Soma has helped my pain tolerance."