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. 
Tri-Trenabol is a part of the chemical group known as 19-nortestoserone (19-nor) and it is an anabolic androgenic steroid . The 19-nor classification refers to the testosterone hormone lacking the carbon atom at the 19th position, a classification that you may already be aware of from the drug Nandrolone. The Trenbolone hormone is actually a derivative of Nandrolone. Specifically, it is the Nandrolone hormone with an added double bond at carbons 9 and 11, which decreases the rate of the hormone’s metabolism, increases its androgen binding affinity and prevents the hormone from aromatizing . This essentially means that the levels of estrogen produced in the body whilst taking this drug are kept down to a minimum when it comes to taking anabolic steroids, a lot of users experience some side effects that are related to the high levels of estrogen, this is going to be unlikely when using Trenabol. While this represents only a slight change in structure from the Nandrolone hormone, it is enough to make the Trenbolone hormone very unique.