muscle spasm
"Wow, was prescribed this for back issues that were apparently muscular in nature, but I was convinced was an actual spinal issue. The pain in my back was so bad. 
At the same time, my doc's were trying in vain to find out what was causing chronic diarrhea for the past 1-2 years, with no luck.
Once I started on Skelaxin, not only has my back improved incredibly, all of a sudden, for the first time in a very long time, the diarrhea is gone as well! Love this medicine. Take it before bed, sleep great and wake up very clearheaded, and not in pain!"