The main medicinal effect of testosterone undecanoate is to promote and maintain the growth and development of male sex organs and secondary sexual characteristics. Testosterone Undecanoate replenishes the body with testosterone and promotes and maintains the growth and development of male sex organs and secondary sexual characteristics, which include stimulation of hair growth, vocalization, and the development of sexual desire. The drug is indicated for testosterone replacement therapy in men with hypogonadism, such as after orchiectomy, anorchidism, hypopituitarism, endocrine impotence, infertility (due to disorders of spermatogenesis), symptoms of menopause in men (including loss of mental and physical strength, decreased libido, etc.), as well as for use in women to masculinize them. Testosterone undecanoate needs to be contraindicated in people who are allergic to the product, male patients with suspected or clearly diagnosed prostate or breast cancer, and pregnant women. Adverse reactions such as diarrhea, abdominal discomfort, abdominal pain, erythrocytosis, fluid and sodium retention, depression, and nervousness may occur after administration. Medication regarding Testosterone Undecanoate should be administered under the supervision of a physician.