Testosterone propionate is a synthetic androgen, the mechanism of action is not fully understood, can inhibit the secretion of FSH in the anterior pituitary, reduce the secretion of estrogen in the ovary, and can counteract the role of estrogen. The experiment found that the occurrence of breast cancer in mice is closely related to ovarian function. Injection of estrogen can increase the incidence of breast cancer in female mice, and can also cause breast cancer in male rats. High dose of this drug can reduce high breast cancer. The incidence of breast cancer in mice. There is significant protein assimilation to promote protein synthesis. In addition, patients with advanced cancer can improve their general condition, and can promote erythropoiesis and hemoglobin synthesis, so that anemia can be improved. Oral is easy to absorb, but it is quickly destroyed in the liver and loses its effect. Therefore, intramuscular injection is generally used.