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. 
Durabolin (Nandrolone)® is a muscle enahancer that is very needed in cutting and bulking cycles. Oregon Labs brand is called Dura 50 which helps you keep the muscle that you gained after a cycle. This product is a must for those seeking pure muscle build-up and a more solid look. You will be very pleased with Dura-50 caps. Novices and less advanced achieve rapid strength and pure muscle gain quick. Dura 50 causes the muscle cell to store more nitrogen than it releases so that a positive nitrogen balance is achieved.