metenolone enanthate metenolone enanthate metenolone enanthate, or methenolone enanthate, sold under the brand names primobolan depot and nibal injection, is an androgen and anabolic steroid (aas) medication which is used mainly in the treatment of anemia due to bone marrow failure. it is given by injection into muscle. although it was widely used in the past, the drug has mostly been discontinued and hence is now mostly only available on the black market. a related drug, metenolone acetate, is taken by mouth. metenolone enanthateclinical datatrade namesnibal injection, primobolan depotother namesmethenolone 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-heptanoateroutes ofadministrationintramuscular injectiondrug classandrogen; anabolic steroid; androgen esterlegal statuslegal status us: schedule iii pharmacokinetic dataelimination half-lifeim: 10.5 daysidentifiers iupac name phenanthren-17-yl] heptanoate cas number303-42-4 ypubchem cid248271chemspider217360 yunii0spd480wfhcomptox dashboard (epa)dtxsid7046754 echa infocard100.005.584 chemical and physical dataformulac27h42o3molar mass414.630 g·mol−13d model (jsmol)interactive image smiles o=c2\c=c(\c)3(1cc4((oc(=o)cccccc)cc41cc3c2)c)c inchi inchi=1s/c27h42o3/c1-5-6-7-8-9-25(29)30-24-13-12-22-21-11-10-19-17-20(28)16-18(2)27(19,4)23(21)14-15-26(22,24)3/h16,19,21-24h,5-15,17h2,1-4h3/t19-,21-,22-,23-,24-,26-,27-/m0/s1 ykey:txuicondjpynpy-frxwoffrsa-n y ny (what is this?) (verify) side effects of metenolone enanthate 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 long-lasting prodrug of metenolone in the body. metenolone enanthate was introduced for medical use in 1962. in addition to its medical use, metenolone enanthate 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 spain and turkey. medical uses metenolone enanthate has been studied in the treatment of breast cancer. side effects