IRCT201303036923N2 IRCT 2013-08-01 Vice chancellor for Research Tehran University of Medical Sciences Comparison the effect of Piracetam versus placebo on control of Attention deficit-hyper activity disorder symptoms. Comparison the effect of Piracetam versus placebo on control of attention deficit-hyper activity disorder symptoms in Iranian children and adolescents, a double blind randomized clinical trial 2013-05-22 anticipated 36 Complete https://irct.ir/trial/7375 interventional Randomization: Randomized, Blinding: Double blinded, Placebo: Used, Assignment: Parallel, Purpose: Treatment. N/A Attention deficit-hyperactivity disorder. Intervention 1: Intervention group will receive 70 mg/kg/day of Piracetam syrup (product of Daroo pakhsh company which contains 33.3 g/dl of drug) every morning , half an hour after taking Methylphenidate tablet. Intervention 2: Control group will receive 70 mg/kg/day of placebo ( Sucrose solution in the same package and same dilution as Piracetam syrup) half an hour after taking their Methylphenidate tablet.