Adderall is a commonly prescribed stimulant to treat ADHD and ADD. Adderall is a 3:1 mixture of dextroamphetamine and levoamphetamine. Adderall is commonly found in two forms, IR and XR. IR is instant release, while XR is extended release. Adderall XR releases half of the dosage immediately, and the other half 4 hours later.
History and culture of amphetamines
(Note: Adderall XR is extended release. Effects take a while to begin, and last much longer)
Onset: 15-30 minutes
Duration:
Low dose: 5-15 mg
Common (typical) dose: 15-40 mg
Strong dose: 40-75 mg
Heavy dose: 75-125+ mg
Onset: 1-5 minutes
Duration:
Low dose: 5-10 mg
Common (typical) dose: 10-30 mg
Strong dose: 30-50 mg
Heavy dose: 50-80+ mg