Metenolone , or methenolone , also known as methylandrostenolone , is a synthetic and orally active anabolic–androgenic steroid (AAS) and a derivative of dihydrotestosterone (DHT) which itself was never marketed.      Metenolone itself is not used as an AAS and the drug is instead supplied in ester prodrug form as metenolone acetate for oral administration and as metenolone enanthate for depot intramuscular injection .   Metenolone esters are no longer widely used medically but do remain available in some countries.  
In February 2009, Sports Illustrated reported that Alex Rodriguez tested positive for two AAS, testosterone and metenolone enanthate, while playing for the Texas Rangers in 2003. He claims to have purchased them over the counter, in the Dominican Republic . However, " boli ," as he referred to it, is an illegal substance in the Dominican Republic.   In an interview with ESPN two days after the SI revelations, Rodriguez admitted to using banned substances from 2001 to 2003, citing "an enormous amount of pressure to perform," but said he had not since then used banned performance-enhancing substances.   He said he did not know the name(s) of the particular substance(s) he was using, and would not specify whether he took them in injectable form.