 And then, I don't know, when I was in college, dexedrine was the amphetamine that was passed around around exam time. And it was known, I in fact once took it to stay up late to study for an exam. But it made me feel horrible. It helped me stay awake and concentrate, but I never wanted to take one again. So amphetamines do help anyone concentrate, not just children with the so-called ADHD.