Goserelin (Brand Zoladex) is a medication used for treating Breast Cancer. It is a hormonal therapy drug that is given as an injection by a doctor or a nurse in a hospital setting or a clinic. Another form of medication known as Goserelin Acetate (Zoladex Implant) is an artificial form of hormone that is used in men to treat the symptoms of prostate cancer. It is also used to treat breast cancer or endometriosis in women by preparing the lining of the uterus for a surgery to correct uterine bleeding or endometrial ablation