muscle spasm
"I fell and got severe whiplash which went undiagnosed and thus untreated for 6 months. I now am undergoing treatment to break down the scar tissue that has accumulated (yes, it's as painful as it sounds!) and I'm constantly in pain due to both the tension in my muscles and the breaking down of scar tissue. Doctor prescribed me 10mg twice a day and my pain is completely gone. Yes, I'm a little drowsy, but it's a small price to pay for relief in my opinion."