Testosterone enanthate is an androgen used to treat low or absent testosterone. Testosterone enanthate is an esterified variant of testosterone that comes as an injectable compound with a slow-release rate. This slow release is achieved by the presence of the enanthate ester functional group attached to the testosterone molecule.2 This testosterone derivative was first approved on December 24, 1953.
Testosterone enanthate in males is indicated as a replacement therapy in conditions associated with a deficiency or absence of endogenous testosterone. Some of the treated conditions are 1) primary hypogonadism, defined as testicular failure due to cryptorchidism, bilateral torsion, orchitis, vanishing testis syndrome or orchidectomy; 2) hypogonadotropic hypogonadism due to an idiopathic gonadotropin or luteinizing hormone-releasing hormone deficiency or due to a pituitary-hypothalamic injury from tumors, trauma or radiation, in this case it is important to accompany the treatment with adrenal cortical and thyroid hormone replacement therapy; 3) to stimulate puberty in patients with delayed puberty not secondary to a pathological disorder..
In females, testosterone enanthate is indicated to be used secondarily in presence of advanced inoperable metastatic mammary cancer in women who are from one to five years postmenopausal. It has also been used in premenopausal women with breast cancer who have benefited from oophorectomy and are considered to have a hormone-responsive tumor.Label.
Administration of ester derivatives of testosterone as testosterone enanthate generates an increase in serum testosterone to levels reaching 400% from the baseline within 24 hours of administration.
These androgen levels remain elevated for 3-5 days after initial administration. Continuous administration of testosterone enanthate shows a significant suppression of dihydrotestosterone, serum PSA, HDL and FSH, as well as a slight increase in serum estradiol.
The levels of dihydrotestosterone and FSH can remain suppressed even 14 days after treatment termination. There are no changes in mood and sexual activity by the presence of testosterone enanthate.
It has an anabolic rating of 100, as do all testosterone compounds. The androgenic rating is also 100. The body will accept it well as it doesn’t realize there any difference between synthesized and natural testosterone. While it is mainly used by men, some women can have too low testosterone levels too.
The effects of testosterone in humans and other vertebrates occur by way of two main mechanisms: by activation of the androgen receptor (directly or as DHT), and by conversion to estradiol and activation of certain estrogen receptors. Free testosterone (T) is transported into the cytoplasm of target tissue cells, where it can bind to the androgen receptor, or can be reduced to 5α-dihydrotestosterone (DHT) by the cytoplasmic enzyme 5α-reductase. DHT binds to the same androgen receptor even more strongly than T, so that its androgenic potency is about 2.5 times that of T.
The T-receptor or DHT-receptor complex undergoes a structural change that allows it to move into the cell nucleus and bind directly to specific nucleotide sequences of the chromosomal DNA. The areas of binding are called hormone response elements (HREs), and influence transcriptional activity of certain genes, producing androgen effects.
Such activities are useful as endogenous androgens like testosterone and dihydrotestosterone are responsible for the normal growth and development of the male sex organs and for maintenance of secondary sex characteristics. These effects include the growth and maturation of the prostate, seminal vesicles, penis, and scrotum; the development of male hair distribution, such as facial, pubic, chest, and axillary hair; laryngeal enlargement, vocal cord thickening, and alterations in body musculature and fat distribution.
Metabolism: To start its activity, testosterone enanthate has to be processed by enzymes in the bloodstream. These enzymes will catalyze the molecule at the ester location of the moiety. Once processed in this manner, the testosterone enanthate molecule is metabolized to various 17-keto steroids through two different pathways. Subsequently, the major active metabolites are estradiol and DHTd. Testosterone is metabolized to DHT by steroid 5α-reductase in skin, liver and urogenital tract. In reproductive tissues DHT is further metabolized to androstanediol.
Absorption: The pharmacokinetic profile of testosterone enanthate was studied in a regime of multiple dosing and the testosterone level was reported to present a Cmax above 1200 ng/dl after 24 hours of the last dose. The concentration decreased sequentially until it reached 600 ng/dl after one week. The pharmacokinetic profile of testosterone enanthate presented differences depending on the administered dose in which the tmax was shifted to a range of 36-48 hours.
Route of elimination: About 90% of a dose of testosterone given intramuscularly is excreted in the urine as glucuronic and sulfuric acid conjugates of testosterone and its metabolites; about 6% of a dose is excreted in the feces, mostly in the unconjugated form. The inactivation of testosterone occurs primarily in the liver.
Half life: Testosterone enanthate presents a long half-life in the range of 7-9 days.
All medicines may cause side effects, but many people have no, or minor, side effects. Some medical conditions may interact with Testosterone Enanthate.
Tell your doctor or pharmacist if you have any medical conditions.
Even though Testosterone Enanthate is well accepted by the body, there are some possible side effects to think about with it. They tend to occur when a person is sensitive to testosterone or when they have a very high dose of this compound. Some individuals have a genetic link to certain issues so this can cause them to experience it more. The good news is if such side effects do develop, they tend to be easy to offset
This is not a complete list of all side effects that may occur. If you have questions about side effects, contact your health care provider.
