Common comorbidities seen in adolescents with attention-deficit/hyperactivity disorder.

This article provides an overview of key research on significant comorbidities that occur among adolescents with attention-deficit/hyperactivity disorder, including disruptive behaviors. Such comorbidities include oppositional defiant disorder and conduct disorder, as well as depressive disorders, anxiety disorders, personality disorders, suicidality, eating disorders, sleep disorders, learning disabilities, Internet "addiction," tic disorders, new-onset pediatric epilepsy, and celiac disease.