When I was on baclofen, I had to take it everyday. I was up to 60 mg and it was not helping. I do not think you are supposed to take it on an as needed basis. I only took zanaflex for two weeks. It seemed to be helping a bit, but it also caused nausea and stomach issues. Or at least I thought it did. I could have just been experiencing a colitis attack, but I was not dx with colitis at the time. My neuro seemed skeptical that it was causing my problems. In retrospect, perhaps he was right.