Attention-Deficit/Hyperactivity Disorder is a neurobehavioral disorder characterized by a combination of inattention, hyperactivity, and impulsive behavior. Symptoms include difficulty sitting still, problems maintaining attention on school or homework, and responding before thinking. Hyperactivity symptoms can include being fidgety, restless, and talking or interrupting others excessively.
ADHD appears early in life. It is estimated that 5 percent of school-age children and 2.5 percent of the adult population are diagnosed with ADHD, according to the DSM-5. Boys are diagnosed twice as often as girls. Teens with ADHD have difficulty sitting still and paying attention in class and may not do well in school, even when they have normal or above average intelligence. More than half of children diagnosed with ADHD continue to have symptoms during adolescence and adulthood. Symptoms of ADHD can be treated effectively with a combination of medication and therapy. When left untreated, however, ADHD can have long-term adverse effects on academic performance, vocational success, relationships, and social-emotional development.