boldenone undecylenate boldenone undecylenate boldenone undecylenate, or boldenone undecenoate, sold under the brand names equipoise and parenabol among others, is an androgen and anabolic steroid (aas) medication which is used in veterinary medicine, mainly in horses. it was formerly used in humans as well. it is given by injection into muscle. boldenone undecylenateclinical datatrade namesboldane, equipoise, parenabol, vebonol, othersother namesboldenone undecenoate; ba 29038; boldenone 17β-undec-10-enoate; δ1-testosterone 17β-undec-10-enoate; 1-dehydrotestosterone 17β-undec-10-enoate; androsta-1,4-dien-17β-ol-3-one 17β-undec-10-enoatepregnancycategory au: x (high risk) routes ofadministrationintramuscular injectiondrug classandrogen; anabolic steroid; androgen esteratc codenonelegal statuslegal status ca: schedule iv uk: pom (prescription only) us: schedule iii pharmacokinetic dataelimination half-lifeintramuscular: 14 daysidentifiers iupac name phenanthren-17-yl] undec-10-enoate cas number13103-34-9pubchem cid11954310drugbankdbsalt001616chemspider10128605uniizs6d2ita30chemblchembl2106059comptox dashboard (epa)dtxsid00156854 echa infocard100.032.734 chemical and physical dataformulac30h44o3molar mass452.679 g·mol−13d model (jsmol)interactive image smiles c12cc3(1cc2oc(=o)ccccccccc=c)ccc4=cc(=o)c=c34c inchi inchi=1s/c30h44o3/c1-4-5-6-7-8-9-10-11-12-28(32)33-27-16-15-25-24-14-13-22-21-23(31)17-19-29(22,2)26(24)18-20-30(25,27)3/h4,17,19,21,24-27h,1,5-16,18,20h2,2-3h3/t24-,25-,26-,27-,29-,30-/m0/s1key:ahmmsnqyopmlsx-cnqksjkfsa-n side effects of boldenone undecylenate 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 strong anabolic effects and moderate androgenic effects, weak estrogenic effects, and no risk of liver damage. boldenone undecylenate is an androgen ester and a long-lasting prodrug of boldenone in the body. boldenone undecylenate was introduced for medical use in the 1960s. in addition to its medical use, boldenone undecylenate is used to improve physique and performance. the drug is a controlled substance in the united states and its use is generally illicit. it remains marketed for veterinary use in australia and the united states. uses veterinary boldenone undecylenate is used in veterinary medicine, mainly in horses. clinical boldenone undecylenate was formerly used in clinical medicine in humans, but was discontinued. the drug is currently not approved by food and drug administration. it is also classified as dea schedule iii controlled substance. side effects