IRCT201104166201N1 IRCT 2011-05-13 Department of Education and Research of Arak University of Medical Sciences Effect of zinc and omega-3 supplements as adjuvant therapy in children with attention-deficit hyperactivity disorder Effect of zinc and omega-3 supplements in children with attention-deficit hyperactivity disorder 2011-10-23 anticipated 150 Complete https://irct.ir/trial/6635 interventional Randomization: Randomized, Blinding: Double blinded, Placebo: Used, Assignment: Parallel, Purpose: Treatment. 3 Attention deficit hyperactivity disorder. Intervention 1: Children will receive omega-3 supplement and Ritalin in the third group. Dose of omega-3 supplement is based on the weight of the child as follows: children less than 25 kg ,100 mg of EPA children between 26 to 35 kg ,200 mg of EPA and children above 36 kg , 400 mg of EPA. Intervention 2: Children will receive placebo with Ritalin in the first group. Intervention 3: Children will receive Zinc supplement 15mg daily and placebo in the second group.