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. 
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In most cases, dosage will be guided for hormone replacement therapy based on your levels, and for the treatment of natural or androgynous deficiencies caused by primary hypogonadism (acquired or congenital).
Finally, it must be mentioned that any particular ester of Trenbolone does not require a similarly estered anabolic steroid to be stacked with it (for example, Trenbolone Enanthate stacked with Testosterone Enanthate). It is a perfectly fine and safe practice to be able to combine, for example, Trenbolone Acetate and Testosterone Enanthate (instead of Testosterone Propionate ) in Trenbolone cycles. These combinations present no problems and actually work well, but every individual curious about these combinations must always be aware that proper timing, half-life, and injection frequency varies with each of these compounds. The only reason why many individuals prefer to stack Testosterone Enanthate with Trenbolone Enanthate , for example, is because of the convenience aspect and ease of administration frequency and timing (as both compounds are identical in half-life).