<unk> , sold under the brand names Andriol and Aveed among others, is an androgen and anabolic steroid (AAS) medication that is used mainly in the treatment of low testosterone levels in men, including hormone therapy for transgender men. It is taken by mouth or given by injection into muscle. Side effects of<unk>  include symptoms of masculinization like acne, increased hair growth, voice changes, hypertension, elevated liver enzymes, hypertriglyceridemia, and increased sexual desire. The drug is a prodrug of testosterone, the biological ligand of the androgen receptor (AR) and hence is an androgen and anabolic steroid. It has strong androgenic effects and moderate anabolic effects, which make it useful for producing masculinization and suitable for androgen replacement therapy.<unk>  is a testosterone ester and a prodrug of testosterone in the body. Because of this, it is considered to be a natural and bioidentical form of testosterone.<unk>  was introduced in China for use by injection and in Europe for use by mouth in the 1970s. It became available for use by injection in Europe in the early to mid 2000s and in the United States in 2014. As of 2019, a formulation for use by mouth has been approved in the United States - Jatenzo. Along with testosterone enanthate, testosterone cypionate, and testosterone propionate,<unk>  is one of the most widely used testosterone esters. However, it has advantages over other testosterone esters in that it can be taken by mouth and in that it has a far longer duration when given by injection. In addition to its medical use,<unk>  is used to improve physique and performance. The drug is a controlled substance in many countries and so non-medical use is generally illicit.
Testosterone undecanoate
Testosterone decanoate
Testosterone acetate
Testosterone furoate
Testosterone propionate
Testosterone enanthate
Testosterone undecylenate
Testosterone valerate