Shenzhen Wenzhi Bio-Technology Co.,Ltd
Shenzhen Wenzhi Bio-Technology Co.,Ltd
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Home>Products>Female Steroids>Health Enhancer Natural Bodybuilding Women , Legal Steroids Women Megestrol

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  • Health Enhancer Natural Bodybuilding Women , Legal Steroids Women Megestrol
  • Health Enhancer Natural Bodybuilding Women , Legal Steroids Women Megestrol
  • Health Enhancer Natural Bodybuilding Women , Legal Steroids Women Megestrol
  • Health Enhancer Natural Bodybuilding Women , Legal Steroids Women Megestrol

Health Enhancer Natural Bodybuilding Women , Legal Steroids Women Megestrol

  • HW Female Steroids
  • 209-864-5 Female Steroids

  • China
  • GMP,SGS,UKAS,ISO
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  • Negotiable
  • foil bag or as your requirement
  • 6 hours after receiving payment
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  • 1000kgs/month
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Shenzhen Wenzhi Bio-Technology Co.,Ltd

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  • Shenzhen Wenzhi Bio-Technology Co.,Ltd2020-07-10 09:46:19
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Product Details

CAS: 595-33-5 EINECS: 209-864-5 Assay: 99%
Molecular Formula: C24H32O4 Molecular Weight: 384.51 Keywords: Female Steroids,Hormone Steroid, Female Acetate, Female Estradiol, Steroid Powder Mifepristone ,Steroid Hormone Pt 141, Steroid Ethisterone, Steroid Estrogen Norethisterone Enanthate, Female Hormone, Steroid Powder Meprednisone, Steroid Hormone Diethylstil

Product Description

Assay 99% Health Enhancer Female Steroids Megestrol Acetate 595-33-5


Basic Information

Item Specification
CAS 595-33-5
Formula C24H32O4
Molecular Weight 384.51
EINECS 209-864-5
Assay 99%

Description

Megestrol acetate (INN, USAN, BAN, JAN) (abbreviated as MGA or MA, and sold mainly under the brand names Megace and Megace ES), also known as 17α-acetoxy-6-dehydro-6-methylprogesterone, is a steroidal progestin and progesterone derivative (specifically, a 17-hydroxylated progesterone) with predominantly progestational and antigonadotropic effects.

Though sometimes referred to simply as megestrol, it is important to clarify that megestrol acetate is not the same as megestrol, which is a closely related but different compound.


Uses


Megestrol acetate is used mainly as an appetite stimulant in a variety of conditions and as an antineoplastic agent in the treatment of breast, endometrial, and prostate cancers. When given in relatively high doses, it can substantially increase appetite in most individuals, even those with advanced cancer, and is often used to boost appetite and induce weight gain in patients with cancer or HIV/AIDS-associated cachexia. It is also used as a contraceptive in combination with an estrogen at relatively low doses.

In addition to its use in humans, megestrol acetate has been used extensively in veterinary medicine in the treatment of medical conditions in cats and dogs.


Dosage


Megestrol acetate is available as 5 mg, 20 mg and 40 mg tablets and in oral suspensions of 125 mg/ml and 40 mg/ml. It is used at a dose of 5 mg in combination with an estrogen for contraception. Appetite stimulation is achieved with doses ranging from 400 mg to 800 mg a day. Doses used to treat cancer usually range from 40 mg to 320 mg.


Pharmacology


Megestrol acetate acts predominantly as a potent agonist of the progesterone receptor (PR) to exert its effects.

Megestrol acetate has powerful antigonadotropic effects in humans at sufficient doses, capable of decreasing circulating androgen and estrogen concentrations to castrate levels in both sexes. It can also decrease sex hormone receptors in certain parts of the body; as an example, one study in men with benign prostatic hyperplasia who were treated with 120–160 mg megestrol acetate per day for 3 to 11 days found average decreases in AR quantity of 73% and 86% in the cytoplasm and nucleus of prostatic cells, respectively. The antigonadotropic effects of megestrol acetate are the result of strong activation of the PR, which suppresses the secretion of the gonadotropins—peptide hormones responsible for signaling the body to produce not only progesterone but also the androgens and the estrogens—from the pituitary gland as a form of negative feedback inhibition, and hence downregulates the hypothalamic-pituitary-gonadal (HPG) axis, resulting in decreased levels of the sex hormones. It is the antiandrogenic and antiestrogenic effects of megestrol acetate mediated by suppression of the HPG axis that are mainly responsible for its beneficial effects against androgen and estrogen-sensitive cancers, respectively.

Megestrol acetate is a high-affinity antagonist/weak partial agonist of the AR, where it binds with very similar but slightly less affinity relative to the PR (about 75% of the affinity according to one assay). Despite its weak intrinsic activity at the AR, at clinical doses in humans, megestrol acetate appears to behave, for all intents and purposes, purely as an antiandrogen. No androgenic side effects have been observed with the use of megestrol acetate in patients of either sex at dosages up to as high as 1,600 mg per day (which is the highest that has been used). Furthermore, it produces detectable androgenic effects in animals only at a dose that is the equivalent of approximately 200 times that typically used for the treatment of prostate cancer in men.

Unlike the case of the AR, megestrol acetate has no significant affinity for the ER. As such, it does not possess the capacity to directly activate the ER. Furthermore, unlike antiandrogens such as cyproterone acetate and flutamide, there is relatively little risk of indirectly mediated estrogenic side effects (e.g., gynecomastia) with megestrol acetate. This is because megestrol acetate strongly suppresses both androgen and estrogen levels at the same time.

Megestrol acetate is an agonist of the glucocorticoid receptor (GR), with similar but less affinity in comparison to the PR and the AR (about 37% and 50% of the affinity, respectively, according to one assay). One study found that, in the dose range tested, it possesses about 50% of the eosinopenic and hyperglycemic activity (markers of glucocorticoid activity) of an equal amount of medroxyprogesterone acetate, and about 25% that of cortisol. Accordingly, manifestations of its glucocorticoid properties, including symptoms of Cushings syndrome, steroid diabetes, and adrenal insufficiency, have been reported with the use of megestrol acetate in the medical literature, albeit sporadically.

Megestrol acetate is frequently used as an appetite stimulant. The direct mechanism of appetite enhancement is unclear, but it is known that megestrol acetate induces a variety of downstream changes to cause the effect, including stimulation of the release of neuropeptide Y in the hypothalamus, modulation of calcium channels in the ventromedial hypothalamus, and inhibition of the secretion of proinflammatory cytokines including IL-1α, IL-1β, IL-6, and TNF-α, all of which have been implicated in facilitation of appetite.


Adverse effects


The most common side effect of megestrol acetate is weight gain. Other side effects may include nausea, vomiting, nightmares, impotence, edema, breakthrough bleeding, and shortness of breath. Rare and more severe side effects may include thrombophlebitis and pulmonary embolism.It may also cause glucocorticoid-related adverse effects such as adrenal insufficiency in some individuals and/or cases (especially if the medication is suddenly discontinued following prolonged use).


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