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, impotence, or other hormonal imbalances. Testosterone injection is also used in women to treat breast cancer that has spread to other parts of the body. Testosterone injection may also be used for other purposes not listed in this medication guide.
Testopel is a medication that is used to provide more testosterone to male patients who do not produce testosterone for themselves. This condition is called hypogonadism. For male organs to grow and mature, the testosterone hormone has to be present.