Not doubting you but… how? Adderall leaves your system in like 4 hours. The half life is crazy short and it’s extremely noticeable when it happens. I don’t understand how someone would fail to sleep for 3 days, or even hyper focus for 12 hours, when the drug is going to be completely gone from their system and not affecting them a fraction of the time into that period. Are you sure it wasn’t something else or they didn’t take more doses or other things?
Drug responses can be weird. Plus if you’ve been told this will make you manic and hyperfocused, your body will respond accordingly even if biochemically that doesn’t make a lot of sense.
Extended release. Those fucking things would keep me up for 3 days. If I take a the same dose of instant release, it'll be worn off at the end of the day and I'll sleep like a log. They say it wears off in 4 hours, but a single dose keeps working all day for me. Depends on how you metabolize it.