muscle spasm
"Taking for neck and back pain, and sciatica from being in a MVA.  Seems to make my hearing sensitive--when I read to my daughter, it's like my voice is too loud so I have to speak very softly.  Absolutely no drowsiness, but I have had a killer headache in the back of my head for days.  It has not made any drastic difference in my muscle pain and sciatica, but I have only been on it less than one week.  Will keep trying it until my follow up in a week.  So far, so good, except for the bad, bad headache in the back of my head.  Sleeping good and waking refreshed, unlike when I took Soma."