muscle spasm
"I was hit by a drunk driver and upon my return to work I would experience back pain and spasms requiring me to take a break for 10 minutes out of every hour. I was afraid that I would of had to go on short term disability because of that. This drug did wonders for me by alleviating that constant need and allowing me to perform at the high levels that I require of myself.  Just fair warning, the first day or two it will make you drowsy, so take it at night with little need to rise early.  It blocked almost all of my back pain and I could get through the 10  hour days as a restaurant manager."