Some bodybuilders and athletes use trenbolone for its muscle-building and otherwise performance-enhancing effects. [ citation needed ] Such use is illegal in the United States and many other countries. The DEA classifies trenbolone as a Schedule III controlled substance 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 , metenolone , and trenbolone. 
In some cases, bodybuilders and athletes may choose to use Winstrol for a short time without using any other compounds. This can increase the risk of some side effects while decreasing the risk of others. For example, failing to use testosterone alongside your Winstrol may lead to some unwanted side effects associated with low testosterone, such as fatigue or a lowered libido. However, if you choose to forego testosterone, there’s no need to add an AI to your stack, which can make things simpler and save you money. You should be sure to weigh the benefits of using a Winstrol cycle with stacks and the risks of running a Winstrol-only cycle before you make a decision.