ADHD refers to a combination of symptoms in the general areas of inattention, impulsivity, and hyperactivity. This condition becomes evident in the preschool years and affects males predominantly. The behavior is seen as being disruptive and unacceptable by parents and teachers, and the child is socially handicapped as a result. Treatment relies on behavioral techniques and medication, predominantly psychostimulants. ADHD is strongly associated with learning disabilities; the treatment of the learning disorder should be based on educational intervention, not drug therapy. Symptoms of ADHD may continue into adulthood, and recommendations for treatment of adults are being made with increasing frequency. The prognosis is best for children who do not have symptoms of a conduct disorder and who lose the symptoms of ADHD before adolescence. A superimposed conduct disorder and maintenance of the symptoms of ADHD put the patient at high risk for antisocial behavior and substance abuse in adolescence and adulthood.