muscle spasm
"At first when I took Tizanidine at night and then in the morning, I had to leave work and go back to sleep. I was so tired and couldn't do anything. After that I only took it at night which was helpful. I discovered I needed to take it just before I went to bed. It makes me drowsy and unable to walk. I even fell out of the bed and hit my head while I was trying to sit up. The good thing is it did stop the muscle spasms. I would recommend it but would warn about the side effects that could happen."