People who have trouble getting focus disorder and are asleep, remain asleep, or have ADHD patterns interrupted are prescribed Adderall. The main purpose of it is to alleviate attention disorder and insomnia temporarily. For adults, a typical suggested dosage of Adderall is 5mg, 10mg, 15mg, 20mg, and 30mg. Adderall is used to treat Attention deficit hyperactivity disorder or for short-term relief of the symptoms of ADD, such as tension and nervousness, as well as certain types of seizures. Adderall may also be used for other conditions as determined by your doctor.