muscle spasm
"I have used Soma for a few months now as needed for muscular back pain and back spasms. I've tried other muscle relaxers, but this is by far the best I've tried.  I can't tell you how much this helps when my back starts acting up.  And there's just enough drowsiness to let you sleep pain free, yet not too much if it's in the middle of the day.  I highly recommend it."