Testosterone propionate/testosterone cypionate/prasterone (TP/TC/DHEA), sold under the brand name Sten, is an injectable combination medication of testosterone propionate (TP), a fast-acting androgen/anabolic steroid, testosterone cypionate (TC), a long-acting androgen/anabolic steroid, and prasterone (dehydroepiandrosterone; DHEA), an androgen and neurosteroid, which has been used to treat andropause, hypogonadism, and impotence in men and breast cancer, fibrocystic breast disease, and low sexual desire in women.[1] [2] [3] [4] [5] It contains 25 mg TP, 75 mg TC, and 20 mg DHEA in 2 mL oil solution provided in ampoules and is administered by intramuscular injection once every 15 to 30 days. The medication was previously marketed in Mexico but appears to no longer available.[6] The duration of action of TP/TC/DHEA has been reported to be approximately 15 to 30 days, due to the long-acting TC component.