Methenolone is often favored by athletes because it helps an athlete maintain a leaner look and improves the efficiency of muscle contractions. It doesn't convert to an estrogen in the body, so the estrogen-related side effects (acne, aggression, water retention, infertility, breast development, etc...) are not seen in those taking the drug. This drug is one of the most expensive of the anabolic steroids.
Pro Baseball insider, Kirk Radomski, who wrote Bases Loaded: The Inside Story of the Steroid Era in Baseball by the Central Figure in the Mitchell Report has said that pro athletes started using Primobolan as far back as 2003 due to the strength gains, limited side effects and lower detection rates of the drug.
(Compare prices for the book Bases Loaded)
It is illegal to have Methenolone in the United States. In 1989, the U.S. Food and Drug Administration issued a border alert that banned the drug, along with 40 anabolic steroids from being brought into the United States along with more that. This alert specifically stated that these drugs are often bought and used illegally by healthy athletes in order to improve performance.
United States Food and Drug Administration, Import Alert, Steroids -IA#60-02, July 31, 1989
The National Institute on Drug Abuse, www.drugabuse.gov, Steroid Abuse and Addiction, August 2006.