Drostanolone is an anabolic steroid. Its main medical applications are to lower cholesterol

Cholesterol

Cholesterol is a complex isoprenoid. Specifically, it is a waxy steroid of fat that is produced in the liver or intestines. It is used to produce hormones and cell membranes and is transported in the blood plasma of all mammals. It is an essential structural component of mammalian cell membranes...

 levels, and as an antineoplastic agent in the treatment of some cancers. It is most commonly marketed as the ester drostanolone propionate

Drostanolone propionate

Drostanolone propionate is an anabolic/androgenic steroid which is the propionate ester of drostanolone. It is known to be highly androgenic and mildly anabolic. It is incapable of aromatization and has similar properties to dihydrotestosterone...

(trade name Masteron).

Ringold, H. J.; Batres, E.; Halpern, O.; Necoechea, E.; J. Amer. Chem. Soc. 1959, 81, 427.

http://dx.doi.org/10.1021/ja01511a040