Boldenone undecylenate, or boldenone undecenoate, sold under the brand names Equipoise and Parenabol among others, is an androgen and anabolic steroid (AAS) drug which is utilized in veterinary medication, predominantly in horses. It was previously utilized in people as well. It is given by infusion into muscle.

Results of boldenone undecylenate incorporate side effects of masculinization like skin break out, expanded hair development, voice changes, and expanded sexual desire. The medication is an engineered androgen and anabolic steroid and subsequently is an agonist of the androgen receptor (AR), the natural objective of androgens like testosterone and dihydrotestosterone (DHT). It makes solid anabolic impacts and moderate androgenic impacts, powerless estrogenic impacts, and no gamble of liver damage. Boldenone undecylenate is an androgen ester and a durable prodrug of boldenone in the body.

Boldenone undecylenate was presented for clinical use in the 1960s. notwithstanding its clinical use, boldenone undecylenate is utilized to further develop physical make-up and performance. The medication is a controlled substance in the US and its utilization is by and large illicit.[6] It remains promoted for veterinary use in Australia and the Unified States.