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. 
With the Government of Salta as operator of the service, the Tren a las Nubes was announced to be running again by March, 2015,   although the service did not begin running again until 4 April 2015. During the 8-month closure of the line, both the National Government and the government of Salta had restored many of the rails as well as the rolling stock.  For that refurbishing, coaches were remodeled by the Province along with freight transport company Belgrano Cargas , while diesel locomotives were repaired at Alta Córdoba workshops.