Amy - i can't help you with an answer cos i honestly have no idea - was actually coming on to ask myself how much coke is tolerable!!! i've had shocking migraines my whole life, and was actually recommended by a neurosurgeon in my teens to drink a can of coke a day to control them (was cheaper than $60 a week meds with caffeine as active ingredient!). i've gone mostly off coke since pg (and a bit before to be honest) but have now had a headache that is feeling like it's heading to a migraine for about four days - would be interested to hear peoples opinion on the caffeine front! i've gone off tea (don't do coffee) and even chocolate isn't sitting well, so i was curious as to wheter a can of coke here and there would be bad for the gremlin....