CAS 7207-92-3 Nandrolone Propionate High Purity Anabolic Steroid Injectable Muscle Growth White Crystalline Powder

Testosterone was the first successfully synthesized anabolic steroid. Testosterone propionate is a fast-acting, short-ester, oil-based injectable testosterone compound that is commonly prescribed for the treatment of hypogonadism – low testosterone levels and various related symptoms in males.

Testosterone propionate was first described in 1935 to increase synthetic testosterone’s therapeutic usefulness by slowing its release into the bloodstream. It was released for clinical use two years later by Schering AG in Germany, featured in a hybrid blend with testosterone enanthate under the brand name Testoviron. This was also the first commercially available version on the U.S. prescription drug market and remained the dominant form of testosterone globally prior to 1960.

Endogenous testosterone is responsible for sexual maturation at all stages of development throughout life. Synthetically, it is prepared from cholesterol. The function of androgens in male development begins in the fetus, is crucial during puberty, and continues to play an important role in the adult male. Women also secrete small amounts of testosterone from the ovaries. The secretion of androgens from the adrenal cortex is insufficient to maintain male sexuality.

Increased androgen plasma concentrations suppress gonadotropin-releasing hormone (reducing endogenous testosterone), luteinizing hormone, and follicle-stimulating hormone by a negative-feedback mechanism. Testosterone also affects the formation of erythropoietin, the balance of calcium, and blood glucose. Androgens have a high lipid solubility, enabling them to rapidly enter cells of target tissues. Within the cells, testosterone undergoes enzymatic conversion to 5-alpha-dihydrotestosterone and forms a loosely bound complex with cystolic receptors. Androgen action arises from the initiation of transcription and cellular changes in the nucleus brought about by this steroid-receptor complex.

Your health care provider needs to know if you have any of these conditions: breast cancer; breathing problems while sleeping; diabetes; heart disease; if a female partner is pregnant or trying to get pregnant; kidney disease; liver disease; lung disease; prostate cancer, enlargement; any unusual or allergic reactions to testosterone or other products; pregnant or trying to get pregnant; breast-feeding. Your healthcare provider will need to have regular bloodwork drawn while on testosterone. This medication is banned from use in athletes by most athletic organizations.

The manufacturers of AndroGel and Striant state that their products are contraindicated in patients with soybean, soy, or soya lecithin hypersensitivity because they are derived partially from soy plants. Topical gels and solutions are typically flammable, therefore exposure to fire, flame, and tobacco smoking should be avoided while using any topical gel or solution formulation of testosterone. Testosterone undecanoate (Aveed) oil for injection contains benzyl benzoate, the ester of benzyl alcohol and benzoic acid, and refined castor oil. Therefore, testosterone undecanoate use is contraindicated in patients with polyoxyethylated castor oil hypersensitivity, benzoic acid hypersensitivity, or benzyl alcohol hypersensitivity

Testosterone is contraindicated during pregnancy because of probable adverse effects on the fetus (FDA pregnancy risk category X). Women of childbearing potential who are receiving testosterone treatments should utilize adequate contraception. Because testosterone is not used during pregnancy, there should be no particular reason to administer the products to women during labor or obstetric delivery; safety and efficacy in these settings have not been established

Testosterone topical solution, transdermal patches, and gels are contraindicated in lactating women who are breast-feeding. It is recommended that other testosterone formulations be avoided during breast-feeding as well. Testosterone distribution into breast milk has not been determined; it is unclear if exposure would increase above levels normally found in human milk. Significant exposure to this androgen via breast-feeding may have adverse androgenic effects on the infant and the drug may also interfere with proper establishment of lactation in the mother.Historically, testosterone/androgens have been used adjunctively for lactation suppression. Alternative methods to breast-feeding are recommended in lactating women receiving testosterone therapy.