Winstrol

Stanozolol

Clinical data
Trade names	Many
Synonyms	NSC-43193; WIN-14833; 17α-Methyl-2'H-androst-2-eno[3,2-c]pyrazol-17β-ol
AHFS/Drugs.com	Multum Consumer Information
Pregnancy category	X
Routes of administration	By mouth, intramuscular injection
Drug class	Androgen; Anabolic steroid
ATC code	A14AA02 (WHO)
Legal status
Legal status	CA: Schedule IV US: ℞-only
Pharmacokinetic data
Metabolism	Liver
Biological half-life	~24 hours
Excretion	Kidney: 84%
Identifiers
IUPAC name (1S,3aS,3bR,5aS,10aS,10bS,12aS)-1,10a,12a-trimethyl-1,2,3,3a,3b,4,5,5a,6,7,10,10a,10b,11,12,12a-hexadecahydrocyclopenta[5,6]naphtho[1,2-f]indazol-1-ol
CAS Number	10418-03-8 Y
PubChem CID	25249
DrugBank	DB06718 Y
ChemSpider	23582 Y
UNII	4R1VB9P8V3
KEGG	D00444 Y
ChEBI	CHEBI:9249 N
ChEMBL	CHEMBL1200324 N
ECHA InfoCard	100.030.801
Chemical and physical data
Formula	C21H32N2O
Molar mass	328.49 g/mol
3D model (JSmol)	Interactive image
SMILES O[C@@]5(C)CC[C@H]4[C@H]3[C@@H]([C@]2(Cc1c(nnc1)C[C@@H]2CC3)C)CC[C@@]45C
InChI InChI=1S/C21H32N2O/c1-19-11-13-12-22-23-18(13)10-14(19)4-5-15-16(19)6-8-20(2)17(15)7-9-21(20,3)24/h12,14-17,24H,4-11H2,1-3H3,(H,22,23)/t14-,15+,16-,17-,19-,20-,21-/m0/s1 Y Key:LKAJKIOFIWVMDJ-IYRCEVNGSA-N Y
NY (what is this?)

Stanozolol, sold under many brand names, is an androgen and anabolic steroid (AAS) medication which was derived from dihydrotestosterone (DHT). It was developed by American pharmaceutical company Winthrop Laboratories (Sterling Drug) in 1962, and has been approved by the Food and Drug Administration for human use, though it is no longer marketed in this country. It is also used in veterinary medicine. Stanozolol has mostly been discontinued, and remains available in only a few countries. It is taken by mouth or by injection into muscle.

Unlike most injectable AAS, stanozolol is not esterified and is sold as an aqueous suspension, or in oral tablet form. The drug has a high oral bioavailability, due to a C17α alkylation which allows the hormone to survive first-pass liver metabolism when ingested. It is because of this that stanozolol is also sold in tablet form.

Stanozolol is one of the AAS commonly used as performance-enhancing drugs and is banned from use in sports competition under the auspices of the International Association of Athletics Federations (IAAF) and many other sporting bodies. Additionally, stanozolol has been used in US horse racing.

Stanozolol has been used in both animals and human patients for a number of conditions. In humans, it has been demonstrated to be successful in treating anaemia and hereditary angioedema, the latter of which it has been specifically approved for the treatment of in some countries.Veterinarians may prescribe the drug to improve muscle growth, red blood cell production, increase bone density and stimulate the appetite of debilitated or weakened animals.