Drostanolone propionate

Drostanolone propionate
Clinical data
Trade names Masteron, Drolban, Masteril, Mastisol, Metormon, Permastril
  • X
Routes of
Intramuscular injection or transdermal cream
ATC code A14
Legal status
Legal status
Pharmacokinetic data
Bioavailability Oral: 0–2%
Intramuscular: 100%
Protein binding Highly
Metabolism Hepatic
Biological half-life 2–3 Days
Excretion Renal
CAS Number 58-19-5 YesY
PubChem (CID) 224004
DrugBank DB00858 YesY
ChemSpider 194604 YesY
ChEBI CHEBI:31523 YesY
Chemical and physical data
Formula C23H36O3
Molar mass 360.53 g/mol
3D model (Jmol) Interactive image

Drostanolone propionate (BAN) (brand names Masteron, Drolban, others), also known as dromostanolone propionate (USAN), as well as 2α-methyl-4,5α-dihydrotestosterone, is a synthetic anabolic-androgenic steroid (AAS) and the propionate ester of drostanolone.[1][2] It is incapable of aromatization and has similar properties to dihydrotestosterone (DHT). It has been successfully used to treat breast cancer, but because of the high risk of virilization, options with better tolerability are usually prescribed instead.[3] Drostanolone propionate is not orally active, and must be administered instead via intramuscular injection.


  1. J. Elks (14 November 2014). The Dictionary of Drugs: Chemical Data: Chemical Data, Structures and Bibliographies. Springer. pp. 652–. ISBN 978-1-4757-2085-3.
  2. Index Nominum 2000: International Drug Directory. Taylor & Francis. January 2000. pp. 377–. ISBN 978-3-88763-075-1.
  3. Chowdhury MS, Banks AJ, Bond WH, Jones WG, Ward HW (1976). "A comparison of drostanolone propionate (Masteril) and nandrolone decanoate (Deca-durabolin) in the treatment of breast carcinoma". Clin Oncol. 2 (3): 203–6. PMID 1036981.

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