What is Adderall? Adderall is a combination medicine that contains two drugs: acetaminophen and dextroamphetamine. It is related to a class of drugs known as central nervous system (CNS) stimulants. Adderall helps treat attention-deficit hyperactivity disorder (ADHD). It also helps treat a specific sleeping disorder known as narcolepsy. Adderall comes as an oral tablet and extended-release oral capsule. Adderall is usually available at most pharmacies. You can easily buy Adderall online-Purdue Pharm. It is one of the best online pharmacies. They offer overnight delivery in the USA and Canada without a prescription.