Drostanolone propionate Medication Description DescriptionDrostanolone propionate, or dromostanolone propionate, sold under the brand names Drolban, Masteril, and Masteron among others, is an androgen and anabolic steroid medication which was used to treat breast cancer in women but is now no longer marketed. It is given by injection into muscle. Molar mass: 360.53 g/mol Elimination half-life: Intramuscular: 2 days Formula: C23H36O3 Drug class: Androgen; Anabolic steroid; Androgen ester Metabolism: Hepatic ATC code: A14 Trade name: Drolban, Masteril, Masteron,