This document provides an outline and overview of attention deficit hyperactivity disorder (ADHD), oppositional defiant disorder (ODD), and conduct disorder (CD) within the child and adolescent population. It defines ADHD and its three main presentations (inattentive, hyperactive-impulsive, combined). Statistics on ADHD prevalence are provided. Common ADHD symptoms and impacts in school-aged children and adolescents are outlined. A multi-modal treatment approach is recommended, including medications, behavioral therapies, and psychoeducation. Common stimulant and non-stimulant medications used to treat ADHD are defined, including considerations for selection. ODD and CD are briefly mentioned regarding risk factors and medications.