This document provides an overview of attention deficit hyperactivity disorder (ADHD), including its causes, diagnosis, epidemiology, treatment, current research studies, and nursing care considerations. Specifically, it discusses that ADHD is a neurobehavioral disorder characterized by inattention, hyperactivity and impulsivity. It affects approximately 4.4 million American youth and often continues into adulthood. While the specific causes are unknown, research suggests genetic and environmental factors may play a role. Treatment focuses on medications, behavioral therapies, and lifestyle modifications to reduce symptoms and improve functioning. Ongoing research continues to evaluate new treatment approaches.