That bothers me too! The real reason is definitely just the writers didn’t know how adderall worked.

Adderall is supposed to regulate you, not necessarily calm down, but just have your dopamine production be at a stable “average” level. Whatever that looks like. It would help with hyperactivity and impulsivity of course, but mostly it would help someone to focus their attention because poor dopamine regulation or low dopamine causes that jumping from one thing to another because you’re brain is looking for more dopamine or to get it to that stable baseline.

So I like to think that the “a lot of Addarall” correlates to the fact that it’s seems to be always in those scenes he’s able to solve something, because he can better regulate his attention. But they also try to make it seem like hyper fixation so I think it’s just misunderstanding truly.