Attention Deficit Hyperactivity Disorder (ADHD).

Hyperactivity, inattention, and impulsivity are hallmarks of attention deficit hyperactivity disorder (ADHD). Most often, the diagnosis is during adolescence. According to some estimates, 8.8% of children between the ages of 4 and 17 have ADHD. The disorder is not unique to children, however. About 4.4% of adults 18-44 are known to suffer from ADHD