This paper focuses on the ADHD -Attention-Deficit Hyperactivity Disorder on Adolescent and Adult After presenting its definition and diagnosis process, the author elaborates on the effects of such diagnosis on adolescents and adults as they experience it in their social and professional lives. Current treatment methods and accompanied theories are mentioned in relation to the psycho-social interventions and the family therapy which primarily designed to facilitate the individuals' adjustments through new arrangements in social life. In addition, the author emphasizes the value of co-constructing the relationships which evolve and embrace the diagnosed as one of us who is always different.