|Trade names||Nibal Injection, Primobolan Depot|
|Synonyms||Methenolone enanthate; Metenolone heptanoate; Metenolone 17β-enanthate; NSC-64967; SH-601; SQ-16374; 1-Methyl-4,5α-dihydrotestosterone 17β-heptanoate; 1-Methyl-DHT heptanoate; 1-Methyl-5α-androst-1-en-17β-ol-3-one 17β-heptanoate|
|Drug class||Androgen; Anabolic steroid; Androgen ester|
|Biological half-life||IM: 4–5 days|
|Chemical and physical data|
|Molar mass||414.621 g/mol|
|3D model (JSmol)|
|(what is this?)|
Metenolone enanthate, or methenolone enanthate, sold under the brand names Nibal Injection and Primobolan Depot, is an injected anabolic–androgenic steroid (AAS) of the dihydrotestosterone (DHT) group. It is a C17β ester of metenolone, and acts as a prodrug of metenolone in the body. Whereas metenolone enanthate is the form of metenolone used for intramuscular injection, metenolone acetate is the form used for oral administration.
As a derivative of DHT, metenolone, the active form of metenolone enanthate, is not aromatized, and so has no propensity for producing estrogenic side effects like gynecomastia. As an AAS, metenolone enanthate is antigonadotropic and can suppress the hypothalamic–pituitary–gonadal axis and produce reversible hypogonadism and infertility.
Metenolone enanthate, or metenolone 17β-enanthate, is a synthetic androstane steroid and a derivative of DHT. It is the C17β enanthate (heptanoate) ester of metenolone, which itself is 1-methyl-δ1-4,5α-dihydrotestosterone (1-methyl-δ1-DHT) or 1-methyl-5α-androst-1-en-17β-ol-3-one.
Society and culture
Use in sports
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.
Metenolone enanthate, which has no approved uses in the United States, is the same AAS with which Barry Bonds allegedly tested positive in 2000 and 2001. A weak AAS on its own, it is generally used in conjunction with other steroids. The drug is generally preferred in injected rather than oral form due to its cost.
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