Suspension Mesterolone Profile:
The English name of mesterolone, Proviro, is the brand name of Schering-Plough (now Bayer) oral androgen mesterolone (1-methyldihydrotestosterone). Like dihydrotestosterone, mesterolone is a strong androgen, but has only weak anabolic activity. This is because, like DHT, mesterolone is rapidly reduced to the inactive diol metabolite in muscle tissue with high 3-hydroxysteroid dehydrogenase concentrations. Some suggest that the weak anabolic properties of mesterolone indicate a tendency to block androgen receptors in muscle tissue, thereby compromising the effects of other, more potent steroids, and this should not be dismissed. In fact, due to its extremely high affinity for plasma-binding proteins such as SHBG, mesterolone can actually act to maintain the activity of other steroids by displacing a higher percentage into the free unbound state. In athletes, mesterolone is primarily used to increase androgen levels when dieting or preparing for competition, and as an anti-estrogen due to its intrinsic ability to antagonize aromatase.
Mesterolone History:
According to company literature, Schering developed Mesterolone Proviron in 1934, making it a very old drug, as far as anabolic/androgenic steroids go. Schering also noted that it is the first drug in clinical practice for the treatment of "hormone-related disorders and male complaints." "Mesterolone was thus developed roughly at the same time as methyltestosterone (1935) and testosterone propionate (1937), both very old drugs and generally considered obsolete by today's standards. Despite its long history, mesterolone was Has a long history of clinical effectiveness and safety, and is still widely used clinically.Usually prescribed to men for the treatment of decreased physical and mental ability caused by age and lower androgen levels, libido caused by insufficient androgen levels Low, mesterolone is widely produced by Bayer (formerly Schering), which currently markets the drug in more than 30 countries around the world. The most common brand name used for sale is Proviron, although Schering/Bayer is already available in some markets as Agents sell it under other names, including Mestoranum and Provironum. In addition, other manufacturers have sold mesterolone for many years under the brands Pluriviron (Asche, Germany), Vistimon (Jenepharm, Germany) and Restore (Brown & Burke, India). Although its With a long track record in safety and efficacy, mesterolone was never approved for sale in the United States. However, it is still available in many Western countries. Today, Bayer remains the major (almost exclusive) global supplier of mesterolone, despite Other brands of medications can be found in rare cases
Mesterolone in the medical field
Given that anabolic/androgenic steroids are often associated with infertility, the use of mesterolone as a fertility aid is perhaps one of the most controversial topics about this drug. This is also an often misunderstood use of Mesterolone by athletes. Mesterolone is appropriate here because it is a potent androgen with minimal suppression of gonadotropins at normal therapeutic doses, not because it increases LH output. In the absence of gonadotropin suppression, mesterolone replenishes androgens necessary for spermatogenesis. It is well known that androgens have a direct stimulatory effect on spermatogenesis and also affect sperm transport and maturation through their effects on the epididymis, vas deferens and seminal vesicles. So the action of these hormones is not entirely inhibitory. Of course I'm talking about therapeutic doses and in the case of inherent flaws
Mesterolone common product specifications:
Mesterolone is widely used in the human pharmaceutical market. Ingredients and dosage may vary by country and manufacturer; preparations usually contain 25mg or 50mg of steroid per tablet, and some manufacturers make less common oral solutions as suspensions.
Mesterolone is a modified form of dihydrotestosterone. It differs by the addition of a methyl group at carbon 1, which helps protect the hormone from hepatic metabolism during oral administration. Oral mesterolone tablets also use the same structural modification. On the first pass, alkylation at one position slows down the hepatic metabolism of the steroid, although much less so than c-17α alkylation. Although overall bioavailability is still much lower than that of c-17α-alkylated oral steroids, mesterolone is sufficiently resistant to break down to achieve therapeutically beneficial blood levels. Mesterolone also has a very strong binding affinity for sex hormone binding globulin. This may shift other steroids that bind SHBG more weakly to their free (active) state.
Mesterolone Side Effects (Estrogenic):
Mesterolone is not aromatized by the body and is not measurable estrogenic. Antiestrogens are not required with this steroid because the drug is less likely to induce gynecomastia, water retention, or other estrogen-related side effects. In fact, mesterolone acts as an anti-aromatase drug, preventing or slowing the conversion of steroids to estrogens. The effect is somewhat comparable to anastrozole, but not as strong as anastrozole. The antiestrogenic properties of mesterolone are not unique, and many other steroids have demonstrated similar activity. For example, dihydrotestosterone and drastandrosterone have been used successfully as treatments for gynecomastia and breast cancer due to their strong androgenic and potentially antiestrogenic effects. It has also been suggested that another steroid nandrolone (Deca) can even reduce aromatase activity in peripheral tissues where it is more resistant to estrogen conversion (the most active site of aromatization for nandrolone appears to be the liver) . The antiestrogenic effects of all these compounds may be due to their ability to compete with other substrates for aromatase binding.
Mesterolone side effects (androgenic):
Mesterolone is classified as an androgenic steroid. Androgenic side effects are common with this substance, especially at higher doses. This can include oily skin, acne, and body/facial hair growth. Anabolic/androgenic steroids may also exacerbate androtype
hair loss. Women are also warned of the potential virilizing effects of anabolic/androgenic steroids. These may include a deepened voice, menstrual irregularities, changes in skin texture, facial hair growth and clitoral enlargement. In addition, 5-alpha reductase does not metabolize mesterolone, so its relative androgenicity is not affected by finasteride or dutasteride.
Mesterolone side effects (hepatotoxicity):
Mesterolone is not c17-alpha-alkylated and is not known to produce hepatotoxic effects;
Hepatotoxicity is unlikely.
Mesterolone side effects (cardiovascular):
Anabolic/androgenic steroids can have deleterious effects on serum cholesterol. This includes a tendency to decrease HDL (good) cholesterol values and increase LDL (bad) cholesterol values, which may shift HDL towards LDL balance in favor of a greater risk of arteriosclerosis. The relative effects of anabolic/androgenic steroids on serum lipids depend on dose, route of administration (oral vs. parenteral), type of steroid (aromatizable or non-aromatizable), and level of resistance to hepatic metabolism. Mesterolone, an orally administered non-aromatizable androgen, was expected to have significant negative effects on lipids. A study of mesterolone 100 mg daily in hypogonadal men for about 6 months showed significant increases in total cholesterol (18.8%) and LDL cholesterol (65.2%) and should not be used when cardiovascular risk factors preclude use of other oral steroids Mesterolone. To help reduce cardiovascular strain, it is recommended to maintain an active cardiovascular exercise program and minimize intake of saturated fat, cholesterol, and simple carbohydrates at all times during active AAS administration. Supplementation with fish oil (4 grams per day) and a natural cholesterol/antioxidant formula such as Lipid Stabil or a product with comparable ingredients is also recommended.
Mesterolone side effects (testosterone suppression):
Mesterolone suppresses gonadotropins and serum testosterone very weakly. Studies have shown that no significant suppression of testosterone levels occurs when administered at moderate doses (150mg per day or less). In studies with high doses of mesterolone (300 mg per day and above), the drug strongly suppressed serum testosterone.
Dosage of mesterolone
For the treatment of androgen deficiency, mesterolone is usually given as 1 tablet (25 mg) three times daily at the beginning of treatment. The drug is then continued at a lower maintenance dose, usually consisting of 1 tablet (25 mg) one to two times daily. Similar doses are used to support male fertility, often with other fertility medications such as injectable FSH. The usual dosage for male athletes is 50mg to 150mg of mesterolone per day, or 2 to 6 25mg tablets. The drug is usually taken in cycles of 6-12 weeks, which is usually a sufficient period of time to notice the benefit of the drug. Many bodybuilders prefer to use mesterolone during dieting phases or during competition preparation because low estrogen and high androgen levels are especially desired. This is especially helpful when drugs such as stanozolol, oxandrolone, or primobolan are used alone because these drugs are relatively low in androgenic hormones. Mesterolone can be effectively used to upregulate the ratio of androgens to estrogens, thereby increasing muscle firmness and density, supporting libido and a general sense of well-being, and increasing the propensity to burn body fat. Gynecomastia prophylaxis is also commonly used (at similar doses) when other aromatizing, transestrogenic steroids are administered, usually in combination with tamoxifen 10-20 mg per day.
Women using mesterolone:
Mesterolone is not approved for use in women. Due to its strong androgenic properties and tendency to produce virilizing side effects, it is not recommended for use by women for enhancement or performance enhancement. However, some women do like the drug and find that one 25mg tablet is enough to effectively alter the hormonal balance in the body, greatly affecting the definition of a physique. In this case, intake is usually limited to no more than four or five weeks to minimize the chances of long-lasting virilizing effects. Taking one tablet with 10 or 20mg of tamoxifen can be more effective at promoting muscle hardening, creating an environment where the body can more easily burn extra body fat, especially in the stubborn areas of female fat storage such as the buttocks and thighs.
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