Adderall for example is amphetamine and
causes hyper activity in most people by stimulating epinephrine, but is calming for
ADHD. Ritalin is another stimulant that works on dopamine uptake and causes a hyper effect, again calming to ADHD. My theory is, the benzo is usually an anti anxiety med that is causing anxiety due to the ADHD, like it causes mania in me, opposite effect. The combo he is taking is a similar feeling to pure heroine, so there is the central issue I see.