muscle spasm
"I have had chronic pain and muscle soreness and tightness for about 13 years. Recently my pain management doctor left his practice but I had 2 refills on my Tizanidine and could no longer get my Hydro :( so I got Tiz refilled. (Previously I had only taken the Tiz at night once in while.) The first time I took it was Sunday during the day and it was fine, it just made me feel a bit relaxed. I also took one Sunday night before bed and slept like a rock. But it seems that this med really adversely affects me the next day. On Monday at work I suddenly started feeling extremely tired and out of it around Noon. (I didn't even take it on Monday.) Then Monday evening I began to get very nauseous and sweaty. Very strange drug. I also got headaches from it"