<unk> (T) is a medication and naturally occurring steroid hormone. It is used to treat male hypogonadism, gender dysphoria, and certain types of breast cancer. It may also be used to increase athletic ability in the form of doping. It is unclear if the use of<unk> for low levels due to aging is beneficial or harmful.<unk> can be used as a gel or patch that is applied to the skin, injection into a muscle, tablet that is placed in the cheek, or tablet that is taken by mouth. Common side effects of<unk> include acne, swelling, and breast enlargement in men. Serious side effects may include liver toxicity, heart disease, and behavioral changes. Women and children who are exposed may develop masculinization. It is recommended that individuals with prostate cancer not use the medication. It can cause harm to the baby if used during pregnancy or breastfeeding.<unk> is in the androgen family of medications.<unk> was first isolated in 1935, and approved for medical use in 1939. Rates of use have increased three times in the United States between 2001 and 2011. It is on the World Health Organization's List of Essential Medicines. It is available as a generic medication. In 2019, it was the 126th most commonly prescribed medication in the United States, with more than 5million prescriptions.
Testosterone 
Counterregulatory hormone
Menotropin
Luteinizing hormone
Orexin
Adrenocortical hormone
Androgen
Adrenalone