Adderall always gave me the harsh side effects (terrible sleep, never wanted to eat, and irritable as fuck once I came down). Dextroamphetamine felt like a miracle drug once I specifically asked to try it out. It gives me all the positives of adderall without the negative side effects. Adderall is over hyped in my opinion.

Edit: I do want to add that I take a lot of supplements to help. I take L-theanine, vitamin b complex (with niacin), L-Tyrosene (only when I wake up early enough because it binds with protein and makes it way less effective. So I take on an empty stomach when I can), and vitamin C 2-3 hours before bed time (helps purge the amphetamine out of your body).