thanks, i would guess, and it is a guess as yet no one else has answered, that any medication could cause minor side effects (easy for me to say minor, as I'm not the one suffering) until we get used to them and this may be the case, i know metformin can cause upset tummy for some, which in some passes after a couple of weeks but not for all and they have to try a different type of met (slow release) this isn't to say you shouldn't contact your gp, this can only be a good idea, better to be safe than sorry