Attention Deficit Hyperactivity Disorder (ADHD) has been considered as one of the most frequently diagnosed psychiatric disorders in children and adolescents. Nowadays it is becoming among one of the most common lifelong psychiatric disorders. Although ADHD symptoms are clearly defined by DSM 5, it influences the life of each person in many different and variable ways. ADHD is not a single phenomenon with simple causes and simple manifestations. One of the main characteristics of ADHD is variability. Variability in etiology, genetics, biology of the disorder, symptomatology and especially real. —