| 17β-Hydroxy-17-methyl-5α -androstano*pyrazole | |
| CAS number 10418-03-8 | ATC code A14AA02 |
| Chemical formula | C21H32N2O |
| Molecular weight | 328.49 |
| Bioavailability | ? |
| Metabolism | Hepatic |
| Elimination half-life | N/A |
| Excretion | Renal: 84% |
| Pregnancy category | X |
| Legal status | Prescription only (US) |
| Routes of administration | Oral, Intramuscular |
Stanozolol, sold under the name Winstrol, was developed by Winthrop Laboratories in 1962. It is a synthetic anabolic steroid derived from testosterone, and has been approved by the FDA for human use.
Unlike most injectable anabolic steroids, Stanozolol is not esterified and is sold as an aqueous suspension. The drug has a large oral bioavailability, due to a C17 α-alkylation which allows the hormone to survive first pass liver metabolism when ingested. Because of this, Stanozolol is also sold in tablet form
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