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Testosterone propionate, or testosterone 17β-propanoate, is a synthetic androstane steroid and a derivative of testosterone. [ 18 ] [ 19 ] It is an androgen ester ; specifically, it is the C17β propionate (propanoate) ester of testosterone.
As oil solutions by intramuscular injection, the elimination half-lives of testosterone esters are 0.8 days for testosterone propionate, 4.5 days for testosterone enanthate, 20.9 days (in tea seed oil) and 33.9 days (in caster oil) for testosterone undecanoate, and 29.5 days for testosterone buciclate.
Sustanon is the preferred method of testosterone replacement in the United Kingdom as detailed in the British National Formulary. [ citation needed ] There was a brief shortage of Sustanon 250 during late 2011, due to shifting of manufacturing site, [ 7 ] and a further shortage in mid-2012 due to manufacturing problems.
Testosterone is a medication and naturally occurring steroid hormone. [9] It is used to treat male hypogonadism, gender dysphoria, and certain types of breast cancer. [9] [10] It may also be used to increase athletic ability in the form of doping. [9]
For reference, testosterone enanthate has an elimination half-life of 4.5 days and a mean residence time of 8.5 days and requires frequent administration of approximately once per week. [21] Large fluctuations in testosterone levels result with it, with levels initially being elevated and supraphysiological. [21]
20 mg testosterone propionate; 40 mg testosterone phenylpropionate; 40 mg testosterone isocaproate; They are provided as an oil solution and are administered by intramuscular injection. The different testosterone esters provide for different elimination half-lives in the body.
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