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Testosterone is an androgen, a sex hormone produced by all humans. It is important in the development of male gonads and sex characteristics. In females, testosterone is an intermediate product in the production of estradiols.

As a pharmaceutical drug, it is used to stimulate sex characteristics, to stimulate production of red blood cells, and to suppress estrogen production. Long-term use can lead to kidney stones, unnatural hair growth, voice changes, and decreased sperm count.

See also under steroid (specifically, anabolic steroids).

Griffith, H.W. 1983. Complete Guide to Prescription and Non-Prescription. Fisher Publishing, Inc. Tucson.

Hadley, M.E. 1984. Endocrinology. Prentice-Hall, Inc. New Jersey. 547.