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Boldenone undecylenate is a prodrug of boldenone. [6] When administered via intramuscular injection, a depot is formed from which boldenone undecylenate is slowly released into the body and then transformed into boldenone. [6] The drug possess a biological half-life of 14 days when administered by intramuscular injection. [1]
Ciba reportedly patented boldenone in 1949. [7] It subsequently developed several experimental esters of the drug in the 1950s and 1960s. [7] One of these was boldenone undecylenate, which was introduced for clinical use under the brand name Parenabol and saw some use in the late 1960s and early 1970s. [7]
In this legislation boldenone was classified as a controlled substance and boldione remained legal. [3] In April 2008 the United States Drug Enforcement Administration published an "Initial Notice of Proposed Rulemaking" concerning the scheduling of three anabolic substances: boldione, desoxymethyltestosterone , and dienedione .
Dihydrotestosterone (DHT), known as androstanolone or stanolone when used medically, and its esters are also notable, although they are not widely used in medicine. [70] Boldenone undecylenate and trenbolone acetate are used in veterinary medicine. [75]
Estradiol cypionate/hydroxyprogesterone caproate (Sinbios) Estradiol cypionate/medroxyprogesterone acetate (Cyclo-Provera, Cyclofem, Lunelle) Estradiol enanthate/algestone acetophenide (Anafertin, Deladroxate, Perlutan, Topasel, Yectames) Estradiol valerate/hydroxyprogesterone caproate (Chinese Injectable No. 1)
Testosterone propionate/testosterone enanthate/testosterone undecylenate (TP/TE/TUe), sold under the brand name Durasteron, is an injectable combination medication of testosterone propionate (TP), testosterone valerate (TV), and testosterone undecylenate (TUe), all of which are androgens/anabolic steroids.
Testosterone undecanoate, an ester of testosterone and one of the most widely used androgen esters.. An androgen or anabolic steroid ester is an ester of an androgen/anabolic steroid (AAS) such as the natural testosterone or dihydrotestosterone (DHT) or the synthetic nandrolone (19-nortestosterone).
Testosterone cypionate is a testosterone ester and a long-lasting prodrug of testosterone in the body. [7] [2] [3] Because of this, it is considered to be a natural and bioidentical form of testosterone. [14] Testosterone cypionate was introduced for medical use in 1951.