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[4] [3] As such, testosterone cypionate and testosterone enanthate are considered to be "functionally interchangeable" as medications. [4] 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]
Cypionic acid is used to prepare ester prodrugs which have increased half-lives relative to the parent compound. The lipophilicity of the cypionate group allows the prodrug to be sequestered in fat depots after intramuscular injection. [2] The ester group is slowly hydrolyzed by metabolic enzymes, releasing steady doses of the active ingredient.
[1] [2] It has a relatively short elimination half-life and mean residence time of 2 days and 4 days, respectively. [1] [2] As such, it has a short duration of action and must be administered two to three times per week. [16] Intramuscular injection of testosterone propionate as an oil solution, aqueous suspension, and emulsion has been ...
Testosterone cypionate: Depo-Testosterone: Oil solution: 50–250 mg 1x/1–4 weeks Testosterone isobutyrate: Agovirin Depot: Aqueous suspension: 50–100 mg 1x/1–2 weeks Testosterone phenylacetate b: Perandren, Androject: Oil solution: 50–200 mg 1×/3–5 weeks Mixed testosterone esters: Sustanon 100, Sustanon 250: Oil solution: 50–250 ...
Testosterone enanthate has an elimination half-life of 4.5 days and a mean residence time of 8.5 days when used as a depot intramuscular injection. [2] It requires frequent administration of approximately once per week, and large fluctuations in testosterone levels result with it, with levels initially being elevated and supraphysiological. [2]
The different testosterone esters provide for different elimination half-lives in the body. Esterification of testosterone provides for a sustained but non-linear release of testosterone hormone from the injection depot into the circulation. Sustanon 100 is administered once every 2 weeks and Sustanon 250 is administered once every 3 to 4 weeks ...
The elimination half-life of testosterone in the blood or by intravenous injection is only about 10 minutes. [ 8 ] [ 33 ] Conversely, testosterone and testosterone esters in oil solution or crystalline aqueous suspension administered by intramuscular or subcutaneous injection have much longer half-lives, in the range of days to months, due to ...
Estradiol cypionate is a synthetic estrane steroid and the C17β cyclopentylpropionate (cypionate) fatty acid ester of estradiol. [ 59 ] [ 22 ] It is also known as estra-1,3,5(10)-triene-3,17β-diol 17β-cyclopentylpropionate.
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