metenolone acetate metenolone acetate metenolone acetate, or methenolone acetate, sold under the brand names primobolan and nibal, is an androgen and anabolic steroid (aas) medication which is used mainly in the treatment of anemia due to bone marrow failure. it is taken by mouth. although it was widely used in the past, the drug has mostly been discontinued and hence is now mostly no longer available. a related drug, metenolone enanthate, is given by injection into muscle. metenolone acetateclinical datatrade namesprimobolan, primobolan s, primonabol, nibalother namesmethenolone acetate; nsc-74226; sh-567; sq-16496; methenolone 17β-acetate; 1-methyl-δ1-4,5α-dihydrotestosterone 17β-acetate; 1-methyl-δ1-dht acetate; 1-methylandrost-1,4-dien-17β-ol-3-one 17β-acetateroutes ofadministrationby mouthdrug classandrogen; anabolic steroid; androgen esteridentifiers iupac name phenanthren-17-yl] acetate cas number434-05-9pubchem cid252372chemspider221129uniiw75590vpkqcomptox dashboard (epa)dtxsid40963004 echa infocard100.006.453 chemical and physical dataformulac22h32o3molar mass344.495 g·mol−13d model (jsmol)interactive image smiles cc1=cc(=o)c21(3cc4((3cc2)cc4oc(=o)c)c)c inchi inchi=1s/c22h32o3/c1-13-11-16(24)12-15-5-6-17-18-7-8-20(25-14(2)23)21(18,3)10-9-19(17)22(13,15)4/h11,15,17-20h,5-10,12h2,1-4h3/t15-,17-,18-,19-,20-,21-,22-/m0/s1key:pgaujqoptmserf-qwqrbhlcsa-n side effects of metenolone acetate include symptoms of masculinization like acne, increased hair growth, voice changes, and increased sexual desire. the drug is a synthetic androgen and anabolic steroid and hence is an agonist of the androgen receptor (ar), the biological target of androgens like testosterone and dihydrotestosterone (dht). it has moderate anabolic effects and weak androgenic effects, as well as no estrogenic effects or risk of liver damage. metenolone enanthate is a metenolone ester and a prodrug of metenolone in the body. metenolone acetate was introduced for medical use in 1961. in addition to its medical use, metenolone acetate is used to improve physique and performance. the drug is a controlled substance in many countries and so non-medical use is generally illicit. it remains marketed for medical use only in a few countries, such as japan and moldova. side effects