Drostanolone propionate (also called Masteron) is an anabolic/androgenic steroid which is the propionate ester of drostanolone. It is known to be androgenic and anabolic. It is incapable of aromatization and has similar properties to dihydrotestosterone. It has been successfully used as a breast cancer drug, but because of the high risk of virilization, safer options are prescribed.
It has gained popularity in the bodybuilding community as a diuretic and muscle defining drug. Individuals interested in using the drostanolone propionate are those that are looking to add muscle hardness and density to their physiques, nearly always for the purpose of bodybuilding competitions.