Gladys - Yes, coke does have caffeine in it, but I took the approach that I wasn't drinking tea or coffee or eating chocolate so the amount I was having was negligable. They recommend you have less than 300mg of caffeine a day, which is about 6 cups of coffee - not sure how much is in a can of coke but I'm sure it's much less. You can get caffeine free coke, so may be try that. Hope you have a puke free weekend ;-)