DEPO TEST 250 is used in replacement therapy in conditions associated with deficiency of endogenous testosterone. It is an oil based injectable, designed to release testosterone slowly from the injection site. Once administered, serum concentrations of this hormone will rise for several days, and remain markedly elevated for approximately two weeks. For medical purposes this is the most widely prescribed testosterone used regularly to treat cases of hypogonadism and other disorders related to androgen deficiency. As with all testosterone products it has a strong anabolic activity, with a pronounced androgenic component. Significant gains in strength and muscle tissue as well a noticeable increase in libido.