Yeah, if I miss a dose of adderall I feel irritable and anxious. When I take it my mind slows down and I can focus enough to manage life. I know its an amphetamine and most people get energy and feel "good" from it but it slows me down. I take my first 30 mg dose at 6AM and go back to bed for about 3 hours of good sleep. The sleep is good because my mind is not racing...everybody reacts a little different to these meds....