Adderall is a prescription medication that is commonly used to treat attention deficit hyperactivity disorder (ADHD) and narcolepsy. It contains a combination of amphetamine and dextroamphetamine, which are central nervous system stimulants that help to increase focus and reduce impulsivity in individuals with ADHD. However, some people may choose to buy Adderall online without a prescription for various reasons, such as to enhance their cognitive performance or to use it as a study aid.