Almost to a person, the addicted twentysomethings I met had taken attention-deficit medication as children, prescribed pills that as they entered adolescence morphed from study aid to party aid. On college campuses, Ritalin and Adderall were not just a way to pull an all-nighter for the physics exam, never mind that they were prescribed to your roommate, not you; they also allowed a person to drink alcohol for hours on end without passing out.