muscle spasm
"My Favorite medicine. I have tried other pain relievers, including Vicodin, but nothing takes the pain away more than Flexeril. It is never had any serious side effects for me and I have even been able to take it while at work to improve my performance when my back would flare up. Best time to take it is right before bed because it puts me right to sleep when I needed to and I wake up feeling no pain at all."