muscle spasm
"I have nerve damage and muscle spasms from a spinal cord compression. This helped with the muscle spasms but I could only take it at night as it made me so incredibly drowsy. Then, I developed severe night sweats. I spoke to my doc who said it wasn't a reported side effect of this drug and must be something else, so I kept taking it another month, but eventually it became unbearable. I was able to determine it really was the drug by taking nothing else and not taking it a few nights, then giving it another try. Sure enough, the drenching night sweats returned. After definitely demonstrating it was in fact the tizanidine causing the problem, the doc switched me."