After being caffeine free for 4 years, 6 months, and 29 days, I made an exception today at 13:00 for an experiment. I wanted to see what caffeine would do to me after such a long time away from it.

I had a very good day, but it was looking quite good from the outset anyway. I was ranting a bit, which I suspect was caused by a bit of extra aggression and agitation from the caffeine. It’s now 22:16 and I need to start winding down for bed, and I’m still feeling quite active and have zero interest in sleeping. So I took a diphenhydramine (mild sedative) to put me to sleep. When I was drinking a lot of caffeine, it never affected my sleep, but it most definitely has today.

I had 330 mL of Coke Zero, which was utterly disappointing and not how I remembered it. I also had a 250 mL Blue RedBull, which was surprisingly tasty. I don’t think I’ll be doing this again though. It has quenched my curiosity of what would happen to me when I consumed caffeine again, but the answer was “nothing good, but nothing particularly bad”.