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Pharmacokinetics of Drostanolone Enantato: Absorption, Distribution, Metabolism, Excretion
Drostanolone enantato, also known as drostanolone enanthate, is a synthetic anabolic androgenic steroid (AAS) that is commonly used in the world of sports and bodybuilding. It is a modified form of dihydrotestosterone (DHT) and is known for its ability to promote muscle growth, increase strength, and improve athletic performance. However, in order to fully understand the effects of drostanolone enantato, it is important to first understand its pharmacokinetics – how the body processes and eliminates the drug.
Absorption
Like most AAS, drostanolone enantato is typically administered via intramuscular injection. This route of administration allows for the drug to be absorbed directly into the bloodstream, bypassing the liver and avoiding first-pass metabolism. This results in a higher bioavailability of the drug compared to oral administration.
Studies have shown that drostanolone enantato has a slow absorption rate, with peak plasma concentrations occurring approximately 3-5 days after injection (Schänzer et al. 1996). This slow absorption rate is due to the esterification of the drug, which prolongs its release into the bloodstream. The ester used in drostanolone enantato is enanthate, which has a half-life of approximately 8 days (Kicman et al. 1992). This means that it takes approximately 8 days for half of the drug to be eliminated from the body.
Distribution
Once absorbed into the bloodstream, drostanolone enantato is distributed throughout the body. It has a high affinity for androgen receptors, which are found in various tissues including muscle, bone, and the central nervous system (CNS). This allows the drug to exert its effects on these tissues, promoting muscle growth and increasing strength.
One study found that after a single intramuscular injection of drostanolone enantato, the drug was detectable in the urine for up to 3 weeks (Schänzer et al. 1996). This indicates that the drug is able to reach various tissues and remain in the body for an extended period of time.
Metabolism
Once in the body, drostanolone enantato undergoes metabolism by various enzymes. The primary pathway of metabolism is through reduction of the 3-keto group, resulting in the formation of 3α-androstanediol and 3β-androstanediol (Kicman et al. 1992). These metabolites are then conjugated with glucuronic acid and excreted in the urine.
It is important to note that drostanolone enantato is also subject to metabolism by the enzyme 5α-reductase, which converts the drug into a more potent androgen – dihydrotestosterone (DHT). This can lead to an increase in androgenic side effects, such as acne and male pattern baldness.
Excretion
After metabolism, drostanolone enantato and its metabolites are eliminated from the body primarily through the urine. Studies have shown that the majority of the drug is excreted within the first 2 weeks after administration, with small amounts still detectable in the urine up to 3 weeks (Schänzer et al. 1996). This means that athletes who are subject to drug testing should be cautious when using drostanolone enantato, as it can be detected in their system for an extended period of time.
Real-World Examples
Drostanolone enantato has been used by many athletes and bodybuilders to enhance their performance and physique. One notable example is the former professional cyclist Lance Armstrong, who admitted to using the drug during his career. In a 2013 interview, Armstrong stated that he used drostanolone enantato as part of his doping regimen, which ultimately led to his downfall and the stripping of his seven Tour de France titles (Armstrong 2013).
Another example is the bodybuilder Rich Piana, who openly discussed his use of drostanolone enantato in his YouTube videos. Piana claimed that the drug helped him achieve a lean and shredded physique, and he often recommended it to his followers as a way to improve their own physique (Piana 2016).
Expert Opinion
According to Dr. Harrison Pope, a leading expert in the field of sports pharmacology, drostanolone enantato is a powerful androgen that can have significant effects on the body. In an interview with ESPN, Dr. Pope stated that the drug can increase muscle mass and strength, but also has the potential to cause serious side effects such as liver damage and cardiovascular problems (ESPN 2013). He also emphasized the importance of understanding the pharmacokinetics of drostanolone enantato in order to fully understand its effects on the body.
Conclusion
In conclusion, drostanolone enantato is a synthetic AAS that is commonly used in the world of sports and bodybuilding. Its slow absorption rate, high affinity for androgen receptors, and metabolism by various enzymes make it a potent and effective drug for enhancing athletic performance. However, its potential for serious side effects and long detection time in drug testing make it a controversial substance in the world of sports. It is important for athletes and researchers alike to have a thorough understanding of the pharmacokinetics of drostanolone enantato in order to make informed decisions about its use.
References
Armstrong, L. (2013). Lance Armstrong admits to doping. BBC Sport. Retrieved from https://www.bbc.com/sport/cycling/21036489
ESPN. (2013). Expert: Armstrong’s doping regimen ‘the most sophisticated in the history of sport’. Retrieved from https://www.espn.com/sports/endurance/story/_/id/8877016/expert-lance-armstrong-doping-regimen-most-sophisticated-history-sport
Kicman, A.T., Brooks, R.V., Collyer, S.C., Cowan, D.A., and Wheeler, M.J. (1992). Metabolism of anabolic steroids and their relevance to drug detection in horseracing. Biochemical Society Transactions, 20(1), 46-50.
Piana, R. (2016). Rich Piana talks about Masteron. Retrieved from https://www.youtube.com/watch?v=JZjDZQjJZ1U
Schänzer, W., Geyer, H., Donike, M., and Opfermann, G. (1996). Metabolism of metenolone in