Caffeine's problem and virtue as a common stimulant is that bodies adapt to it readily and become dependent. Blood pressure doesn't spike when you're used to it, sleep is less effected, etc.

Caffeine's problem as self medication for ADHD is that as a result it's more of an addiction than a self-medication. The short and long term benefits are minimal and it's more of a comforting habit than treatment. Maybe ADHD peeps are chasing that initial benefit, or maybe we just use it because it's legal and we're tired from staying up late.

[–] TheSlad@sh.itjust.works 2 points 5 hours ago

I used to drink over two liters of coffee every day. I stopped that a few years ago, now i typically only have it one or twice a week. I dont think I feel any different compared when i was drinking it regularl or when i drink a lone cuppa now, as if my body has become immune to caffeine from using it so heavily for many years.