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). Esterification renders AAS into metabolism-resistant prohormones of themselves, improving oral bioavailability, increasing lipophilicity, and extending the elimination half-life (which necessitates less frequent administration). In addition, with intramuscular injection, AAS esters are absorbed more slowly into the body, further improving the elimination half-life. Aside from differences in pharmacokinetics (e.g., duration), these esters essentially have the same effects as the parent drugs. They are used in androgen replacement therapy (ART), among other indications. Examples of androgen esters include testosterone esters such as testosterone cypionate, testosterone enanthate, testosterone propionate, and testosterone undecanoate and nandrolone esters such as nandrolone decanoate and nandrolone phenylpropionate.
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La testostérone est un médicament et une hormone stéroïde naturelle. Elle est utilisée pour traiter l' hypogonadisme masculin, la dysphorie de genre et certains types de cancer du sein. Elle peut également être utilisé pour augmenter la capacité athlétique sous forme de dopage .On ne sait pas exactement si l'utilisation de la testostérone pour remédier aux faibles niveaux dus au vieillissement est bénéfique ou nocive. La testostérone peut être utilisée sous forme de gel ou de patch à appliquer sur la peau, à injecter dans un muscle, à placer dans la joue ou à prendre par la bouche.
Nandrolone phenylpropionate (NPP), or nandrolone phenpropionate, sold under the brand name Durabolin among others, is an androgen and anabolic steroid (AAS) medication which has been used primarily in the treatment of breast cancer and osteoporosis in women. It is given by injection into muscle once every week. Although it was widely used in the past, the drug has mostly been discontinued and hence is now mostly no longer available. Side effects of NPP include symptoms of masculinization like acne, increased hair growth, voice changes, and increased sexual desire.
Nandrolone decanoate, sold under the brand name ROLON among others, is an androgen and anabolic steroid (AAS) medication which is used primarily in the treatment of anemias and wasting syndromes, as well as osteoporosis in menopausal women. It is given by injection into muscle or fat once every one to four weeks. Side effects of nandrolone decanoate may include symptoms of masculinization like acne, increased hair growth, voice changes, and decreased sexual desire due to its ability to suppress endogenous testosterone synthesis while not being a sufficient androgen itself.