I have ADD, and am prescribed 60mg Adderall XR/day. OTOH, I have slept on 30mg Adderall XR a couple of times, so maybe I'm just "built differently" w.r.t. The Stimmies.
I guess this is a really nice hack he had: Has used Ritalin illegally? Increased probability of ADHD. Does it work? Even more increased probability and he know knows the person tolerates it.
This fascinates me. Some people seriously take stimulants at night to fall asleep, others in the morning to wake up..!
Recently I heard the story about how stimulants came to be used to treat ADHD and one thing that stood out except that this was an extremely suprising effect was the very simplified explanation that stimulants seems to stimulate the inhibitory parts of the brain most which seems to account for the increased self control.
I have previously used Modafinil fairly extensively and considered purchasing Ritalin or Adderall on the dark web, but was very worried about telling the doctor in case it would cause me issues getting treatment.