Abstract： Objective To study the liver and kidney function and muscle effects of rosuvastatin in rats.Methods In this study,twenty healthy male rats (9-month-old) were randomly divided into two groups:normal control group and rosuvastatin treatment group.The first treated group was given conventional feed; The second treated group was given conventional feed and oral rosuvastatin [5mg/( kg · d)] of 12 weeks.The level of liver and kidney function and creatine kinase,histological changes of liver and muscle were examined before and after the treatment.Results Our findings demonstrate that the level of liver and kidney function and creatine kinase was no significant difference among the two experimental groups,also no difference before and after treatment( P ＞0.05).At the same time,liver and muscle showed no abnormal pathology.Conclusion These findings collectively indicate that rosuvastatin shows no significant side effects in the liver and kidney function and muscle pathology compared with control group.