Objective: To explore the effects of Yougui Pills and its disassembled formula on the pathological changes of kidney yangdeficiency male rats. Methods: Fifty male SD rats were selected and randomly divided into the normal control group, the model group, the nourishing yin group, the tonifying yang group and the whole formula group. Except for the normal control group, the model of kidney yang deficiency was established in other groups. After successful modeling, the nourishing yin group, the tonifying yang group and the whole formula group were given the corresponding medicine for intragastric...