There are a number of websites that claim to sell Adderall online without a prescription. However, it is important to note that it is illegal to order Adderall onlin e without a prescription in the... Adderall is a medication that is used to treat ADHD (attention deficit hyperactivity disorder). It is a central nervous system stimulant that works by increasing the levels of dopamine and norepinephrine in the brain. Adderall is available in both an immediate-release and extended-release form. The extended-release form of Adderall is known as Adderall XR.