Adderall is a prescription medication used to treat attention deficit hyperactivity disorder (ADHD). It is a stimulant that helps improve focus, attention, and behavior. Adderall can be purchased online from a variety of sources, but it is important to purchase from a reputable source to ensure that you are getting the real medication. Most online pharmacies require a prescription to order Adderall, but there are a few that will sell it without a prescription. Overnight delivery is available from some online pharmacies, and same day delivery is available from a few.