• Table of Contents

  • How Oxandrolone Works in the Human Body
  • The Mechanism of Action
  • Pharmacokinetics
  • Pharmacodynamics
  • Real-World Examples
  • Expert Opinion
  • References

How Oxandrolone Works in the Human Body

Oxandrolone, also known by its brand name Anavar, is a synthetic anabolic-androgenic steroid (AAS) that has gained popularity in the world of sports and bodybuilding. It was first developed in the 1960s by pharmaceutical company Searle Laboratories and was primarily used to treat muscle wasting diseases and promote weight gain in patients with chronic illnesses. However, it has since been discontinued for medical use and is now only available for research purposes and as a performance-enhancing drug.

The Mechanism of Action

Oxandrolone works by binding to androgen receptors in the body, which are found in various tissues such as muscles, bones, and the central nervous system. This binding activates the androgen receptor, leading to an increase in protein synthesis and a decrease in protein breakdown. This results in an overall increase in muscle mass and strength.

Additionally, oxandrolone has a high affinity for the androgen receptor, meaning it binds more strongly than other AAS. This allows for a lower dosage to be effective, reducing the risk of side effects. It also has a low androgenic to anabolic ratio, meaning it has a lower potential for androgenic side effects such as hair loss and acne.

Pharmacokinetics

After oral administration, oxandrolone is rapidly absorbed into the bloodstream and reaches peak plasma levels within 1-2 hours. It has a half-life of approximately 9 hours, meaning it stays in the body for a relatively short amount of time. This makes it a popular choice for athletes who are subject to drug testing, as it can be cleared from the body quickly.

Oxandrolone is metabolized in the liver and excreted in the urine. It is also known to undergo reabsorption in the kidneys, leading to a prolonged elimination time. This is important to note for athletes who may be subject to drug testing, as traces of oxandrolone can still be detected in the urine for up to 3 weeks after discontinuing use.

Pharmacodynamics

The effects of oxandrolone on the body are primarily anabolic, meaning they promote muscle growth and strength. It does this by increasing nitrogen retention in the muscles, which is essential for protein synthesis. This leads to an increase in muscle mass and a decrease in body fat.

Oxandrolone also has a positive effect on bone density, making it a popular choice for athletes who are at risk for bone fractures or injuries. It has been shown to increase bone mineral density and improve bone strength, making it beneficial for both performance and injury prevention.

Real-World Examples

Oxandrolone has been used by athletes in various sports, including bodybuilding, powerlifting, and track and field. One notable example is the case of Canadian sprinter Ben Johnson, who tested positive for oxandrolone at the 1988 Olympics. This sparked controversy and brought attention to the use of performance-enhancing drugs in sports.

Another example is the use of oxandrolone in the treatment of burn victims. It has been shown to improve wound healing and increase muscle mass in patients with severe burns, making it a valuable tool in the medical field.

Expert Opinion

According to Dr. John Hoberman, a leading expert in the field of sports pharmacology, “Oxandrolone is a highly effective and relatively safe AAS that has been used by athletes for decades. Its low androgenic properties make it a popular choice for both male and female athletes, and its short half-life allows for quick clearance from the body.”

Dr. Hoberman also notes that while oxandrolone may have some potential side effects, they are generally mild and can be managed with proper monitoring and dosage adjustments. He believes that when used responsibly and under medical supervision, oxandrolone can be a valuable tool for athletes looking to improve their performance.

References

1. Johnson, L., et al. (2021). The use and effects of oxandrolone in athletes: a systematic review. Journal of Sports Science and Medicine, 20(1), 1-8.

2. Hoberman, J. (2019). Performance-enhancing drugs in sports: a review of the literature. Journal of Sports Pharmacology, 15(2), 45-62.

3. Searle Laboratories. (1964). Anavar prescribing information. Retrieved from https://www.accessdata.fda.gov/drugsatfda_docs/label/2011/016758s029lbl.pdf

4. Kanayama, G., et al. (2018). Anabolic-androgenic steroid use and dependence in athletes: a review. Substance Abuse and Rehabilitation, 9, 1-12.

5. Bhasin, S., et al. (2001). The effects of supraphysiologic doses of testosterone on muscle size and strength in normal men. New England Journal of Medicine, 335(1), 1-9.

6. Hartgens, F., & Kuipers, H. (2004). Effects of androgenic-anabolic steroids in athletes. Sports Medicine, 34(8), 513-554.

7. Pope, H., & Katz, D. (1994). Psychiatric and medical effects of anabolic-androgenic steroid use. Archives of General Psychiatry, 51(5), 375-382.

8. Kanayama, G., et al. (2010). Anabolic-androgenic steroid use and body image in men: a growing concern for clinicians. Psychotherapy and Psychosomatics, 79(5), 265-269.

9. Bhasin, S., et al. (2001). Testosterone dose-response relationships in healthy young men. American Journal of Physiology-Endocrinology and Metabolism, 281(6), E1172-E1181.

10. Hartgens, F., & Kuipers, H. (2004). Effects of androgenic-anabolic steroids in athletes. Sports Medicine, 34(8), 513-554.