Comment by hudell

Those pills have different effects on people with adhd and people without it. A pretty bad explanation trying to keep it simple: The adhd brain basically destroys neurotransmitters in the brain before they can be absorbed by the body. The stimulant will cause a lot more neurotransmitters to be created so that more of them can be absorbed by the body (both the natural NTs and the ones caused by the stimulant). For someone without adhd there wasn't anything stopping the natural NTs before so all the stimulant will do is flood the body with one kind of stuff.