This may not be strictly related, but my personal experience aligns with that. If I drink coffee after lunch, I get very sleepy and have my usual bowel movements. If I drink it after dinner, I become overstimulated and can’t sleep at all (which I realize is fairly typical). For context, I’m referring to classic Italian espresso.

This is such a BS lie sold by pharmaceutical companies, "stimulants are safe for your child, amphetamines will actually calm them down". There's a thing called fast caffeine metabolizers, and 50% of people have this genetic variation and perfectly explains why some people can nap after having caffeine, also tolerance.

I digress, but you will never convince me otherwise, that the wide spread promotion of amphetamines in children/young adults is anything but an experiment of Empire. I attribute the somewhat significant economic edge US society has over the rest of the world is due to its addiction to amphetamines, and the ruling classes project to push them onto working class people to make them more effective workers.

Its no different than how the Nazi's used amphetamines to simulate their population or how imperialist Japan did the same. Lets stop spreading this BS lie that stimulants calm people with ADHD down.