Adderall is a brand-name combination medicine that contains amphetamine and dextroamphetamine (CNS stimulants). Doctors use this medication as a treatment for ADHD and narcolepsy from children to adults. You can buy Adderall 30mg online in the USA with overnight delivery when you are out of medication. The CNS stimulants affect brain chemical and nerve cells that are in charge of hyperactivity and impulse control.