Masterone or Drostanolone Propionate. Each 1 ml contains Drostanolone Propionate 100mg in Oil base quantity sufficient. Drostanolone propionate is an anabolic/androgenic steroid which is the propionate ester of drostanolone. It is known to be androgenic and anabolic. It is incapable of amortisation and has similar properties to dihydrotestosterone. It has been successfully used as a breast cancer drug. Drostanolone Propionate is a derivative of DHT, and its chemical structure is 2α-methyl-dihydro-testosterone propionate. Drostanolone Propionate is commonly used in treatment of certain forms of breast cancer.