Abstract:Objective To summarize the adverse reactions of rabbit antithymocyte globulin in treatment of children with aplastic anemia. Methods 61 children with AA treated with ATG and CsA in our department were analyzed, 31 of them received (Genzyme) R-ATG and CsA, the other 30 received Fresenius-ATG and CsA therapy, comprehensive measures were used to prevent and control ATG related adverse reactions. The incidence of adverse effects between the two groups were compared, the relationship between adverse reactions and efficacy rate, adverse related factors were also analyzed. Results There were no significant differences in ATG-induced adverse reactions between the (Genzyme) R-ATG and Fresenius-ATG groups. The incidence of anaphylactoid reactions, serum sickness, platelet transfusion and infection were 35.48 % versus 40.00 %, 35.48 % versus 43.3 %, 9.70 % versus 16.70 %, 29.03 % versus 23.33 % respectively. There were no significant differences for Efficacy rates of group with adverse reactions and group without adverse reactions. The incidence of adverse reactions were not significantly different for gender, age and severity. Conclusion The immunosuppressive treatment with antithymocyte globulin and cyclosporin is safe and effective for children with AA. Adverse reactions could be avoided and treated with comprehensive measures. Adverse reactions did not affect the therapy efficacy. Gender, age and severity may not related with adverse reactions.