Winstrol (substance deystvuschee - stanozolol) - anabolic steroid produced in tablets and solution for injection (Winstrol Depot). Winstrol was developed in 1962 at Winthrop Laboratories. It is a synthetic steroid derivative of testosterone approved by the FDA for human use. Initially, stanozolol has been developed for use in animals (horses). Unlike most forms of stanozolol injection is an aqueous suspension.