Muscle Spasm
"I have been taking zanaflex for about 2 years. The best thing about this medicine is it helps me sleep and for me there is no grogginess in the morning. I&#039;m totally alert. Not like with other muscle relaxants. However the medicine usually last about 3-4 hours so it&#039;s quite common to wake up in the middle of the night. I give it an 8 because it does work really well for me however I wish the effects would last a little longer to get a full nights rest and also because I can&#039;t take it in the day because it knocks me out.....cold."