The present study included 60 asthmatic children, out of them , 40 patients received antioxidant therapy in the recommended daily dose for 12W in addition to their regular treatment, 20 patients was included as a control group . pulmonary function tests ( PFTs ) were done for all patients before and after 3 months of therapy. The result, showed that, there were improvement in asthmatic patients after antioxidant treatment in both (PFTs) and in clinical manifestations.