Stanozolol which is popularly marketed under the name Winstrol is a derivative of dihydrotestosterone, chemically altered so that the hormoneâ€™s anabolic (tissue-building) properties are greatly amplified and its androgenic activity minimized. Stanozolol is classified as an â€œanabolicâ€ steroid, and exhibits one of the strongest dissociations of anabolic to androgenic effect among commercially available agents. It also cannot be aromatized into estrogens. Stanozolol is the second most widely used oral steroid, succeeded in popularity only by Dianabol (methandrostenolone). It is favored for its ability to promote muscle growth without water-retention, making it highly valued by dieting bodybuilders and competitive athletes.
Stanozolol is the generic name of stanozolol in English , German , French , and Japanese and its INN , USAN , USP , BAN , DCF , and JAN , while stanozololum is its name in Latin , stanozololo is its name in Italian and its DCIT , and estanozolol is its name in Spanish .    Androstanazole , stanazol , stanazolol , and estanazolol are unofficial synonyms of stanozolol.   The drug is also known generically by its former developmental code names NSC-43193 and WIN-14833 . 
In most cases a good Winstrol cycle will run for approximately 6-8 weeks at a dosing of 50mg every day. Some will find 50mg every other day to be all they need but as this anabolic steroid has a very short half-life, especially in tablet form daily administration is generally best. 50mg per day appears to be perfect for most any man regardless of his level of experience and we do not recommend going beyond the 8 week mark as this steroid is rather liver toxic. Winstrol is one of the more hepatic anabolic steroids we will ever use but thankfully if used responsibly the liver will return to normal values very quickly after use has been discontinued. The only exception we might make regarding the dose of a Winstrol cycle is for the competitive bodybuilder towards the very end of his contest prep cycle. Many bodybuilders find 100mg per day the last 10-14 days before a show to be very useful in-terms of really hardening them up before they step on stage; however, 14 days is the maximum recommended duration for such a dose due to the toxicity of this steroid.