The Search Engine podcast has a great recent episode on this. Pharmaceutical Speed was super abused back in the day, and this was the source of drug categorizat

The Search Engine podcast has a great recent episode on this. Pharmaceutical Speed was super abused back in the day, and this was the source of drug categorization under Nixon. Schedule 1 drug, etc. This led to a dramatic drop in drug use. Big Pharma, in the quest to restoe its profits, pivoted to children. Child fidgety? Can't pay attention? ADDERALL! The episode is based on the author's first-person experience. I won't spoil the big reveal.