Hi, i have been put on a course of Fragyl, which i need to take for appr 3 weeks for my crohns.. My body is aching , could this be a side effect. and i have had a shockingheadache, i am on day 5. Anyone else take this drug? maybe i am just getting the flu (kids have had it ) Also after much googling, just wonder what this drug actually does. I have just finished 6weeks on predisilone. thanks