I also take tizanidine (zanaflex) 4mg 3 times a day...I usually have to break up my daytime dose to 2mg otherwise I fall asleep at work, but at night time I take the full 4mg dose. I think I am going to have to up the dose though....I have started working out recently and as I build up my muscles and lose more weight (lost 80 so far), I hope to rely less on muscle relaxers too!