Testosterone is a naturally occurring sex hormone that is produced in a man's testicles. Small amounts of testosterone are also produced in a woman's ovaries and adrenal system.
Testosterone injection is used in men and boys to treat conditions caused by a lack of this hormone, such as delayed puberty or growth. It is only recommended for males with a known medical condition, such as a genetic disorder, problem with certain brain structures (called the hypothalamus and pituitary) or previous chemotherapy.
Testosterone injection is also used in women to treat certain types of breast cancer that have spread to other parts of the body.
Testosterone should not be used to enhance athletic performance or to treat normal male aging.
Testosterone injection is also used "off-label" for the treatment of gender dysphoria. Injections are typically administered weekly by the user in a home setting.
