Stanozolol, commonly sold under the name Winstrol and Winstrol Depot, is a synthetic anabolic steroid derived from dihydrotestosterone. It was developed by Winthrop Laboratories in 1962, and has been approved by the FDA for human useStanozolol, commonly sold under the name Winstrol and Winstrol Depot, is a synthetic anabolic steroid derived from dihydrotestosterone. It was developed by Winthrop Laboratories in 1962, and has been approved by the FDA for human useStanozolol, commonly sold under the name Winstrol and Winstrol Depot, is a synthetic anabolic steroid derived from dihydrotestosterone. It was developed by Winthrop Laboratories in 1962, and has been approved by the FDA for human useStanozolol, commonly sold under the name Winstrol and Winstrol Depot, is a synthetic anabolic steroid derived from dihydrotestosterone. It was developed by Winthrop Laboratories in 1962, and has been approved by the FDA for human use