Attention Deficit Hyperactivity Disorder “ADHD”! ADHD Overview: “ADHD” stands for attention deficit hyperactivity disorder, a condition with symptoms such as inattentiveness, impulsivity, and hyperactivity. The symptoms differ from person to person. “ADHD” was formerly called “ADD”, or attention deficit disorder. Both children and adults can have “ADHD”, but the symptoms always begin in childhood. Adults with