What is Adderall? Adderall is a CNS stimulant of the phenethylamine class. Being a highly addictive medication, the Food and drugs administration (FDA) Controls its production, supply, availability, and distribution. You can purchase Adderal (tablets or extended-release tablets) only with a proper prescription from your doctor from a chemist shop near you or order Adderal online. If you buy the medicine via an online store, you can reap the benefit of a hefty discount on the medication.