• By any chance are you autistic? Many autistic people report that sedatives and stimulants have opposite effects for them, with sedatives leaving them wired and stimulants leading to them becoming tired. I had a similar issue with benedryl as a kid.

    • Benadryl is also a sedative for me. I’ve heard the caffeine thing is related to ADHD, but there is a ton of comorbidity in both directions. I probably meet some of the criteria for autism but haven’t ever sought out a formal diagnosis, if only because I’m a stats professor, so my benchmark for “normal” is probably off by quite a ways :).