Commercial Product FDA Precaution Web page
TOPICAL
Androgel ® AbbVie Inc. North Chicago, IL Large doses of exogenous androgens may lead to suppression of spermatogenesis or azoospermia through feedback inhibition of pituitary FSH.  This could possibly lead to adverse effects on semen parameters, including sperm count. http://www.androgel.com/default.aspx
Androderm® Watson Pharmaceuticals, Inc. Oakville, Ontario, Canada Taking testosterone may lead to a condition in which there are no sperm in the semen http://www.androderm.com/
Testim®  Auxilium Pharmaceuticals, Inc. Malvern, PA At large doses of exogenous androgens, spermatogenesis may also be suppressed through feedback inhibition of pituitary follicle-stimulating hormone (FSH). In large doses, Testim may lower your sperm count. http://www.testim.com/
Fortesta® Endo Pharmaceuticals Inc. Malvern, PA With large doses of exogenous androgens, includingFortesta, spermatogenesis may be suppressed through feedback inhibition of pituitary follicle-stimulating hormone, which could possibly lead to adverse effects on semen parameters including sperm count. In large doses, Fortesta may lower your sperm count. The administration of exogenous testosterone has been reported to suppress spermatogenesis in the rat, dog, and non-human primates which was reversible on cessation of the treatment. http://www.fortestagel.com/
Axiron® Lilly USA, LLC. Indianapolis, IN At large doses, spermatogenesis may be suppressed which could possibly lead to adverse effects on semen parameters including, sperm count. http://www.axironmd.com/Pages/home.aspx
                                                   BUCCAL
Striant® Mipharm S.p.A Milan, Italy During exogenous administration of androgens, endogenous testosterone release may be inhibited through feedback inhibition of pituitary luteinizing hormone (LH). At large doses of exogenous androgens, spermatogenesis may also be suppressed through feedback inhibition of pituitary follicle-stimulating hormone (FSH). http://www.actientpharma.com/filebin/pdf/products/58816-10_Striant_full_PI_4pager.pdf
INTRAMUSCULAR/SUBCUTANEOUS
Testosterone enanthate Hikma Pharmaceutical (Portugal), S.A. During exogenous administration of androgens, endogenous testosterone release is inhibited through feedback inhibition of pituitary luteinizing hormone (LH). Large doses of exogenous androgens may suppress spermatogenesis through inhibition of pituitary follicle stimulating hormone (FSH). http://www.drugs.com/pro/testosterone-enanthate.html
Testosterone cypionate West-ward pharmaceutical corp. Eatontown, NJ 07724 USA Exogenous administration of androgens may lead to azoospermia. http://www.drugs.com/pro/testosterone-cypionate.html
Testopel® Slate Pharmaceuticals Inc.
Durham, NC
During exogenous administration of androgens, endogenous testosterone release is inhibited through feedback inhibition of pituitary luteinizing hormone (LH). At large doses of exogenous androgens, spermatogenesis may also be suppressed through feedback inhibition of pituitary follicle stimulating hormone (FSH). http://www.testopel.com/
Table 1: Prescribing Information for U.S. commercial testosterone preparations.