Stanozolol
Also known as: Winstrol, winny
Status
No approved product. FDA-approved as Winstrol 2 mg tablets (NDA 012885), including for hereditary angioedema; Drugs@FDA lists the product as discontinued (retrieved 25 October 2026), so no marketed FDA-approved product was found. That US approval covered the oral tablet only: the injectable aqueous suspension sold today for intramuscular use is a separate, unapproved form with unverified contents, and the tablet approval does not extend to it. Other countries were not verified for this entry. Schedule III controlled substance.
What it is
A DHT-derived androgen once approved in the US as Winstrol oral tablets (hereditary angioedema), now discontinued. The injectable aqueous suspension sold for intramuscular use is unapproved: Drugs@FDA shows no approval for that form, so there is no label and the contents are unverified.
What published research measured
A 17-alpha-alkylated derivative of dihydrotestosterone, which is the structural feature that lets it survive first-pass liver metabolism and also the feature behind its hepatic strain. The sources cited for this entry are analytical (detection in water and sludge, and contaminated supplements). They cannot establish clinical efficacy, effects on cholesterol, liver or joints, or any other human outcome; those claims are not made here until a clinical source is verified.
Caution
Winstrol (NDA 012885) is listed as discontinued in Drugs@FDA; no marketed FDA-approved product was found. It is a Schedule III controlled substance.
Source
Liu S et al. 2011 (environmental analytical method) · Geyer H et al. 2008 (supplement contamination testing). Clinical source not yet verified.
Sources
No linked primary source is on file for this entry yet.
Educational use only, never medical advice. No doses.