Objective To investigate the mechanism of reactive oxygen species(ROS)and pyroptosis in amioda-rone-induced lung epithelial cell injury.Methods The viability of cells treated with amiodarone,amiodarone+N-acetylcysteine(ROS inhibitor,NAC)and amiodarone+NF-κB inhibitors was detected by MTT assay.ROS level was detected by DCFA probe and the levels of IL-6,IL-18,IL-1β and TNF-α in the supernatant were detected by ELISA;NLRP3.Caspase-1 p20 and GSDMD-N protein were detected by Western blot.Results Amiodarone con-centration-dependently reduced cell viability(P＜0.05),NAC and NF-κB attenuated the cytotoxicity of amiodarone(P＜0.05).Amiodarone increased levels of reactive oxygen species,inflammatory factors and pyroptosis-related proteins in lung epithelial cells(P＜0.05),while NAC and NF-κB inhibitors reduced the levels of these indicators(P＜0.05).Conclusions NF-κB inhibitor or NAC attenuates amiodarone-induced injury of human lung epithelial cell line in vitro.