Objectives : SimJeok-Hwan (CP, Cardiotonic Pills) is the traditional remedy to treat patients with coronary arteriosclerosis, angina pectoris and hyperlipidemia. This study was designed to investigate the effects of CP on changes in serum cholesterol levels in hyperlipidemic rats. Methods : In this study, we investigated the effects of CP on changes in body weights, food and water uptake, fasting blood glucose, total cholesterols, HDL-cholesterol, and triglyceride in hyperlipidemic rats. Results : In our results, body weights of hyperlipidemic rats induced by high fat diet did not changed, and treatment with CP did not affect body weights in hyperlipidemic rats. For experimental period, food and water uptake in CP administered group were the same as those in hyperlipidemic control group. In this experiment, treatment with CP decreased total cholesterol and triglyceride in serum which elevated by high fat diet respectively. Conclusions : These results suggest that CP is useful to treat patients with disease related to hyperlipidemia because CP can decrease cholesterol in serum