Testosterone deficiency results from loss of endogenous testosterone production in the aging male. Testosterone deficiency is associated with the symptoms of decreased energy, decreased libido, erectile dysfunction, mood disturbances and decreased sense of well being. It is also associated with metabolic abnormalities such as osteoporosis, metabolic syndrome, obesity and lipid abnormalities.
Testosterone replacement therapy has been shown to improve all of the symptoms of testosterone deficiency. A full spectrum of treatment options are available for this condition, including transdermal gels and patches, buccal pellets, subcutaneous pellets and intramuscular injections.