Lisdexamfetamine is used as part of a treatment program to control symptoms of attention deficit hyperactivity disorder (ADHD; more difficulty focusing, controlling actions, and remaining still or quiet than other people who are the same age) in adults and children. Lisdexamfetamine is also used to treat binge eating disorder (an eating disorder characterized by periods of uncontrolled overeating). Lisdexamfetamine is in a class of medications called central nervous system stimulants. It works by changing the amounts of certain natural substances in the brain.