muscle spasm
"I was prescribed Zanaflex 4mg after my acl reconstruction. My doctor advised me to take the medication when or if I had spasms in my leg.  Shortly after surgery I had spasms and I took Zanaflex. Within 30 mins after taking it, my spasms went away. Now I am taking it about every 4 hours and I have not had any spasms.                       
 The medicine did make my mouth dry but i would much rather have dry mouth than leg spasms. All in all, this drug is awesome!!"