Update: I made it to 47 hours before I gave in to a throbbing headache and downed a Diet Coke. Decided that it might be more prudent for me to gradually cut back instead of going cold turkey. Did realize that I miss the fizz more than the caffeine, though. Sparkling water with a splash of juice or a fitness water flavor packet from Crystal Light works wonders. I am down to one Diet Coke per day instead of way more than one. That’s progress in my book.