Eilyad Issabeagloo, Taghi Aharchi, Mohammad Taghizadieh and Parviz Kermanizadeh
ADHD (Attention Deficit Hyperactivity Discarded) is a prevalent disease that is seen commonly in school-aged students, and had some complications in their life and study. We conducted a clinical trial study that is a type of experimental study. We took a memoir from patients that are suspected for ADHD and had a complete physical examination in northwest of iran in 2009-2011. In addition, we had a questionnaire for diagnosing the ADHD. All of the phases of the study were morally checked. We had two groups that first group includes 200 children (5.5-7.5 year) consist of 170 male (85%) and 30 female (15%) and second group include 200 children (6-8 year) consist of 190 male (95%) and 10 female (5%). Medication’s replacement from methylphenidate to TCA medicines has no significant impact on increasing respond to the treatment. The results indicate that there is 74.4% respond to two drug treatment since it is better to add second drug (TCA) instead of cutting off or replacing the drug in resistance to methylphenidate.