Mesterolone acetate capsules have the following side effects:1, local changes in the breast, which can lead to local pain or the phenomenon of breast overflow.2, may lead to amenorrhea.3, there will be neurological reactions, such as insomnia, fatigue, or dizziness.4, there may be allergic reactions, such as manifested as itchy skin, urticaria, or angioneurotic edema, etc..5, there may also be Gastrointestinal reactions, such as nausea or dyspepsia, especially in large doses may be more pronounced gastrointestinal reactions. 1, under the guidance of a doctor to take. 2, in the period of use of the drug should not be discontinued without authorization. 3, if anaphylactic reactions, it is recommended to stop using the drug.