Adderall 30 mg tablet; is prescribed medication a combination of Amphetamine and dextroamphetamine medication. 30 mg Adderall for the treatment of attention deficit hyperactivity disorder. It works the central nervous system by changing a certain amount of natural substances. Adderall dosages and XR dose; maximum used for adults and children 30 mg per day. Take directly by mouth with or with food. Before going to bed take Adderall for better results.