Buy Metenolone enanthate (Primobolan Depot) Cas 303-42-4
Buy Metenolone enanthate (Primobolan Depot) Cas 303-42-4
Metenolone enanthate, or methenolone enanthate, sold under the brand names Primobolan Depot and Nibal Injection, is an androgen and anabolic steroid (AAS) medication which is used mainly in the treatment of anemia due to bone marrow failure.[2][3][4][5][6][7] It is given by injection into muscle.[6] Although it was widely used in the past, the drug has mostly been discontinued and hence is now mostly only available on the black market.[5][6][3] A related drug, metenolone acetate, is taken by mouth.[6]
Side effects of metenolone enanthate include symptoms of masculinization like acne, increased hair growth, voice changes, and increased sexual desire.[6] The drug is a synthetic androgen and anabolic steroid and hence is an agonist of the androgen receptor (AR), the biological target of androgens like testosterone and dihydrotestosterone (DHT).[6][8] It has moderate anabolic effects and weak androgenic effects, as well as no estrogenic effects or risk of liver damage.[6][8] Metenolone enanthate is a metenolone ester and a long-lasting prodrug of metenolone in the body.[6]
Metenolone enanthate was introduced for medical use in 1962.[6] In addition to its medical use, metenolone enanthate is used to improve physique and performance.[6] The drug is a controlled substance in many countries and so non-medical use is generally illicit.[6] It remains marketed for medical use only in a few countries, such as Spain and Turkey.
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Anabolic steroids (A14) (trademark names in brackets) |
|
|---|---|
| Androstan (carbon 19 present) | Androstadienone • Boldenone undecylenate (Equipoise) • 4-Chlordehydromethyltestosterone (Turinabol) • Clostebol • Desoxymethyltestosterone (Madol) • DHEA • DHT • Drostanolone (Masteron) • Fluoxymesterone (Halotestin) • Furazabol (Miotolan) • Methandrostenolone (Dianabol) • Methenolone • Mesterolone (Proviron) • Methenolone enanthate (Primobolan) • Mestanolone • Norethandrolone • Oxandrolone (Anavar) • Oxymetholone (Anadrol) • Oxymetholone (Anadrol-50) • Quinbolone (Anabolicum Vister) • Stanozolol (Winstrol) • Testosterone |
| Estren (carbon 19 absent) | Ethylestrenol • Mibolerone (Cheque Drops) • Nandrolone (Deca Durabolin) • Norbolethone (Genabol) • Oxabolone cipionate • Tetrahydrogestrinone (The Clear) • Trenbolone (Fina) |
Synthesis of Methenolone Enanthate
- PI Steriods Methenolone Enanthate Powder Dosage Usage Effect and Benefit
- 303-42-4
Quick Details
- ProName:API Steriods Methenolone Enanthate Po…
- CasNo:303-42-4
- Appearance:White powder
- Application:【 Use 1 】 A nutritional supplement. O…
- DeliveryTime:7-15
- PackAge:25kg drum/bag
- Port:Tianjin/Qingdao
- ProductionCapacity:1000 Metric Ton/Day
- Purity:≥99.0%
- Storage:Keep in dry and cool place
- Transportation:by Sea, air and express
- LimitNum:1 Metric Ton
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- Heavy Metal:
Methenolone enanthate, or methenolone enanthate, is a dihydrotestosterone (DHT) based anabolic steroid. It is an ester derivative of methenolone sold commonly under the brand names Primobolan (tablet form) or Primobolan Depot (injectable).
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When it interacts with the aromatase enzyme it does not form any estrogens. It is used by people who are very susceptible to estrogenic side effects, having lower estrogenic properties than nandrolone. Methenolone, in form of enanthate and acetate, is available as an injection or as an oral respectively. The injection is naturally regarded as having a higher bioavailability. It is an enanthate ester which is quite long-acting. Because it by-passes hepatic breakdown on the first pass, it also has a higher survival rate. The tablets are in a short-lived acetate form. Methenolone is not 17-alpha-alkylated, but 1-methylated for oral bioavailability. This reduces the stress on the liver, but also the availability. It is considered one of the safer steroids, meaning it has few side effects. Methenolone has no estrogenic side effects, and its effects on cholesterol levels are minimal. In doses of 200 mg or less (intramuscular) blood pressure is rarely altered.
It is possibly one of the safer anabolic steroids for females due to very low virilization effects in short-term usage. Of course, this is not a blanket-statement and individual results (dependent on doses and tolereance) will vary.
Methenolone is also not overly suppressive of the HPTA axis, although how suppressive is debatable. For this reason, many bodybuilders use it in between steroid cycles during their “off-time” to help maintain their gains and strength. The long term safety of such a practice possibly dangerous and can lead to permanent suppression of the HPTA.
The synthesis of methenolone enanthate is achieved through the esterification of the 17βhydroxyl group of methenolone. A Chinese patent suggests the preparation of methenolone
enanthate from methenolone via heptanoylation.[2] The following protocol is based on this
principle, employing enanthoic anhydride as the acylating agent and pyridine as the catalyst
and solvent.
Medical uses
Metenolone enanthate has been studied in the treatment of breast cancer.[9][10]
Side effects
Pharmacology
Pharmacodynamics
| Medication | Ratioa |
|---|---|
| Testosterone | ~1:1 |
| Androstanolone (DHT) | ~1:1 |
| Methyltestosterone | ~1:1 |
| Methandriol | ~1:1 |
| Fluoxymesterone | 1:1–1:15 |
| Metandienone | 1:1–1:8 |
| Drostanolone | 1:3–1:4 |
| Metenolone | 1:2–1:3 |
| Oxymetholone | 1:2–1:9 |
| Oxandrolone | 1:13–1:3 |
| Stanozolol | 1:1–1:3 |
| Nandrolone | 1:3–1:16 |
| Ethylestrenol | 1:2–1:19 |
| Norethandrolone | 1:1–1:2 |
| Notes: In rodents. Footnotes: a = Ratio of androgenic to anabolic activity. Sources: See template. | |
As a derivative of DHT, metenolone, the active form of metenolone enanthate, is not aromatized, and so has no propensity for producing estrogenic side effects like gynecomastia.[6] As an AAS, metenolone enanthate is antigonadotropic and can suppress the hypothalamic–pituitary–gonadal axis and produce reversible hypogonadism and infertility.[6][11]
Pharmacokinetics
The biological half-life of metenolone enanthate is reported to be about 10.5 days by intramuscular injection.[1]
Chemistry
Metenolone enanthate, or metenolone 17β-enanthate, is a synthetic androstane steroid and a derivative of DHT.[2][3][6] It is the C17β enanthate (heptanoate) ester of metenolone, which itself is 1-methyl-δ1-4,5α-dihydrotestosterone (1-methyl-δ1-DHT) or 1-methyl-5α-androst-1-en-17β-ol-3-one.[2][3][6]
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History
Metenolone enanthate was introduced for medical use in 1962 in the United States under the brand name Nibal Depot.[6] It was soon discontinued in the United States and was marketed instead in Europe in the 1960s and 1970s under the brand name Primobolan Depot.[6]
Society and culture
Generic names
Methenolone enanthate is the USANTooltip United States Adopted Name of metenolone enanthate, and methenolone is the BANTooltip British Approved Name of its active form, metenolone.[2][3][4][5] Conversely, metenolone is the INNTooltip International Nonproprietary Name of metenolone.[2][3][4][5]
Brand names
Metenolone enanthate is or has been marketed under the brand names Nibal Injection and Primobolan Depot.[2][3][6][5]
Availability
Metenolone enanthate is marketed in Spain and Turkey.[5][6]
Doping in sports
There are known cases of doping in sports with metenolone enanthate by professional athletes.
References
- Westreich LM (2011). “Anabolic-Androgenic Steroids”. In Ruiz P, Strain EC (eds.). Lowinson and Ruiz’s Substance Abuse: A Comprehensive Textbook. Lippincott Williams & Wilkins. pp. 358–. ISBN 978-1-60547-277-5.
- Elks J (14 November 2014). The Dictionary of Drugs: Chemical Data: Chemical Data, Structures and Bibliographies. Springer. pp. 784–. ISBN 978-1-4757-2085-3.
- Index Nominum 2000: International Drug Directory. Taylor & Francis. 2000. pp. 659–661. ISBN 978-3-88763-075-1.
- Morton IK, Hall JM (6 December 2012). Concise Dictionary of Pharmacological Agents: Properties and Synonyms. Springer Science & Business Media. pp. 178–. ISBN 978-94-011-4439-1.
- “List of Androgens and anabolic steroids”.
- William Llewellyn (2011). Anabolics. Molecular Nutrition Llc. pp. 633–. ISBN 978-0-9828280-1-4.
- Handelsman DJ (25 February 2015). “Androgen Physiology, Pharmacology, and Abuse”. In Jameson JL, De Groot LJ (eds.). Endocrinology: Adult and Pediatric E-Book. Elsevier Health Sciences. pp. 2388–. ISBN 978-0-323-32195-2.
- Kicman AT (2008). “Pharmacology of anabolic steroids”. Br. J. Pharmacol. 154 (3): 502–21. doi:10.1038/bjp.2008.165. PMC 2439524. PMID 18500378.
- Kennedy BJ, Yarbro JW (February 1968). “Effect of methenolone enanthate (NSC-64967) in advanced cancer of the breast”. Cancer. 21 (2): 197–201. doi:10.1002/1097-0142(196802)21:2<197::AID-CNCR2820210207>3.0.CO;2-R. PMID 4952912.
- Notter G (December 1975). “Treatment of disseminated carcinoma of the breast by metenolone enanthate”. Acta Radiologica. 14 (6): 545–551. doi:10.3109/02841867509132696. PMID 1224996.
- van Breda E, Keizer HA, Kuipers H, Wolffenbuttel BH (Apr 2003). “Androgenic anabolic steroid use and severe hypothalamic-pituitary dysfunction: a case study”. Int J Sports Med. 24 (3): 195–196. doi:10.1055/s-2003-39089. PMID 12740738. S2CID 260166539.
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