Stanozolol is banned for use by all sports organizations and its use is actively screened in the urine. The drug is easily detected in the urine for up to 5-7 days after the last dose. Most bodybuilders use this drug just before a sports event because of the mistaken belief that it is not detectable after a 2 week washout period. Recent advances in detection can identify metabolites of winstrol in the urine for up to 2 months. And one note of concern – the majority of bodybuilders are found to be users of anabolic steroids not because of the intellect of the scientists but because a colleague or someone close brags about the use.
Oral Stanozolol is commonly used in the definition stage, or during the caloric deficit, if the goal of the user is to lose body fat. Stanozolol helps to reduce the amount of fat tissue and increase lipolysis and oxidation of fat and, more importantly, helps maintain muscle mass during this time. The calorie deficit can cause the body to go into a state which uses amino acids (muscle) as an energy source, which is unwelcome state if this occurs during the phase of preparation for competition. Preservation of muscle tissue occurs due to the properties of stanozolol in increasing nitrogen retention and protein synthesis in muscle.
Some bodybuilders and athletes use trenbolone esters for their muscle-building and otherwise performance-enhancing effects.  Such use is illegal in the United States and many other countries. The DEA classifies trenbolone and its esters as Schedule III controlled substances under the Controlled Substances Act .  Trenbolone is classified as a Schedule 4 drug in Canada  and a class C drug with no penalty for personal use or possession in the United Kingdom .  Use or possession of steroids without a prescription is a crime in Australia .  The infamous "duchess" cocktail administered to Russian athletes at the Sochi Winter Olympics consisted of oxandrolone , a metenolone ester, and a trenbolone ester.