In fact this is almost exactly what happens with many children being prescribed Adderall.

To counteract your bullshit...

If someone has ADHD, adderall slows them down so they can concentrate. It reduces mind-fog from too much stimulus.

If you don't have ADHD, its like a super cup of coffee, but in pill form.

My doctor was trying to figure out my cognitive issue. And for a time, I was on adderall. It was pretty easy to tell that I didn't have ADHD, since I started getting upper'd. Felt nice, don't get me wrong. But I'll stick with coffee.

More interesting question: How do we know regular drug users are not self medicating.

They in fact frequently are. There are huge communities dedicated to that on the Internet. BTW a lot of the previously illegal and unthinkable treatments these people used have just been legalised in the EU, using MDMA etc.

Indeed. And although I wouldn't recommend the self-medicating route, it's hard to deny that there are some people who get much better results doing that than getting "official" medical help.

Professionals can be found even though its illegal. I wouldn't recommend self-medication either.