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. 
There are legitimate reasons to use drugs, primarily to treat disease. Cattle host stomach-churning liver flukes, eyeworms, lungworms, stomach worms, thin-necked intestinal worms and whipworms , all of which are treated with parasiticides. Turkeys suffer from aspergillosis (brooder pneumonia), avian influenza, avian leucosis, histomoniasis, coccidiosis, coronavirus, erysipelas, typhoid, fowl cholera, mites, lice, herpes, clostridial dermatitis, cellulitis and more for which they are also treated with unlabeled drugs. (The Federal Register says the anti-coccidial drug halofuginone used in turkeys "is toxic to fish and aquatic life" and "an irritant to eyes and skin." Users should take care to "Keep [it] out of lakes, ponds, and streams.") The endocrine disrupter Bisphenol A (BPA) has even been found in fresh turkey meat.