Vyvanse, a brand name for lisdexamfetamine, is a prescription medication commonly used to treat attention deficit hyperactivity disorder (ADHD) and binge eating disorder. As a prodrug, Vyvanse is metabolized in the body to its active form, dextroamphetamine, which is a central nervous system stimulant. This medication works by increasing the levels of neurotransmitters, such as dopamine and norepinephrine, in the brain, leading to improved focus, attention, and impulse control.