Stimulant medications prescribed for ADHD in children can paradoxically calm them or improve their ability to focus.

“So the idea of taking stimulants of consuming things or smoking things in order to increase alertness is not a new idea. It's just that in ADHD, it's surprising that these things would work, right? I mean, if the problem is Attention Deficit Hyperactivity Disorder, what we're really talking about here, or children that are prescribed a drug that ought to be a stimulant, it ought to make them hyper hyperactive and rather than doing that, it actually somehow serves to calm them a bit, or at least allow them to focus.”