Originally Posted by PR_Glen

a real one with all that sugar? that's your advice? How is that better than diet coke?

This is a caffeine issue, nothing more. if he drank 6 coffees a day it would be the same issue if not worse. I generally have one coffee a day tops, but I have stopped completely for the last few months. I'm a bit sensitive to caffeine myself so doesn't take much to keep me up all night. If you were drinking a lot ease off it instead and you will be fine, whatever you do don't replace it with sugar.