Middle-aged and elderly people can also take testosterone undecanoate, need to follow the doctor’s instructions combined with the patient’s individual situation with medication. Testosterone undecanoate belongs to the hormone class of drugs, mainly used for the treatment of primary or secondary testicular hypogonadism, middle-aged and elderly partial androgen deficiency syndrome, male menopausal libido loss and other conditions. Therefore, middle-aged and elderly people can also take testosterone undecanoate. However, the use of this drug may induce adverse reactions such as prostate enlargement, prostate cancer, erythrocytosis, depression, nervousness, emotional distress, and hypertension. Also, the drug cannot be used if the patient is diagnosed with prostate cancer, breast cancer and other conditions. Therefore, patients need to use the drug under the guidance of the doctor and targeted to the specific situation. In the process of using the drug, if there is an adverse reaction, stop the drug as soon as possible to reduce the impact on the patient.