As with all drugs, this is not a simple, binary matter. For some people, there is a very real risk that stimulants and antidepressants will cause serious psych

As with all drugs, this is not a simple, binary matter. For some people, there is a very real risk that stimulants and antidepressants will cause serious psychological problems; that risk increases with dose, and even a person who is fine with low doses will probably have a psychotic episode at very high doses. Just look at the doses being discussed in the article -- this kid was blowing through a month's prescription in two weeks time, and his prescription was for 60mg/day (sometimes higher). He was past the point of therapeutic doses and that he had psychotic delusions is not terribly surprising. I have heard of people succumbing to stimulant psychosis after drinking too much coffee for too many days. This happens with cocaine, amphetamines, cathinones, etc. Moderation is essential for using these drugs safely, though that statement is equally true for any drug.