You aren't the first member we've had who drinks too much coke. I don't know what's in it, but I know that brand name coke has something in it that has a huge impact on people. I know, for example, that when I've hit that exhaustion wall I can have brand name diet coke it can be enough to enable me to get home.... I also know that original coke was developed as an industrial cleaning agent lol
Have you tried things like generic cola rather than the original coke?