The main focus of this study is to investigate oxidative/nitrosative stress and antioxidant effects and immunohistochemical effects in cisplatin-induced lung toxicity. In the study, 12 male Sprague Dawley rats, 2 months old, were divided into two groups: control (n=6) and cisplatin (n=6). Isotonic solution was administered to control and cisplatin 10 mg/kg single dose intraperitoneal to cisplatin group. Reducte glutathione (GSH), malondialdehyde (MDA) and nitric oxide (NO) levels were determined by spectrophotometricmethod in the lung tissues taken. Paraffin blocks were made from lung tissues and stained with hematoxylin-eosin (HE) staining. Immunohistochemically, p53, CD3, CD20, Bcl-2 ve Ki67 were evaluated. It was found that cisplatin administration alone had no effect on MDA and GSH values in the lung tissue of rats, and NO levels were significantly increased (P