The three-monthly injection for prostate cancer usually refers to the anti-androgen drug goserelin acetate (10.8mg/branch), which is used by subcutaneous injection through the anterior abdominal wall once every three months, in addition to the dose of goserelin acetate (3.6mg/branch), which needs to be injected every 28 days, and the use of which should be in accordance with the doctor’s instructions. Goserelin acetate extended-release implant is suitable for prostate cancer, breast cancer, endometriosis, etc., which can be treated with hormone therapy, mainly by inhibiting the secretion of sex hormones, which leads to the atrophy of the gonads, and it can reduce the recurrence rate, improve the quality of life, and prolong the life of patients. To sum up, anti-tumor drugs must be used according to the medical advice of professional doctors in hospitals, and any adverse reactions during the process of using drugs should be told to the doctors in time for necessary adjustments, and must not stop the drugs on their own.