Oxandrolone: Uses, Dosage, Benefits & Risks

Introduction

Oxandrolone is a synthetic anabolic steroid derived from testosterone, with the chemical formula C19H30O3. It is used medically to promote weight gain in various catabolic states, to offset protein catabolism caused by long-term corticosteroid therapy, and for relief of bone pain in osteoporosis. Oxandrolone is an orally active 17α-alkylated anabolic-androgenic steroid (AAS). The drug was first introduced in 1964 under the brand name Anavar and has since been used in various clinical applications.

Medical Uses of Oxandrolone

Oxandrolone is indicated as adjunctive therapy to promote weight gain after weight loss following extensive surgery, chronic infections, or severe trauma, and in some patients who without definite pathophysiologic reasons fail to gain or to maintain normal weight. It has also been used to relieve bone pain accompanying osteoporosis and to offset the protein catabolism associated with prolonged administration of corticosteroids.

In a study published in the Journal of Parenteral and Enteral Nutrition , oxandrolone was shown to significantly improve weight gain and lean body mass in patients with severe burns when administered as an adjunct to a high-protein diet.

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Oxandrolone is an androgen and anabolic steroid. It works by increasing the production of proteins that act as building blocks for muscle cells, leading to increased muscle growth and body weight. Oxandrolone also interacts with hormone receptors in the body, altering the balance of endogenous hormones. According to a study in the Journal of Clinical Endocrinology & Metabolism , oxandrolone exerts its anabolic effects primarily by increasing protein synthesis rather than decreasing protein breakdown.

Dosage Forms and Administration

Oxandrolone is available as 2.5 mg and 10 mg tablets for oral administration. The recommended adult dosage is 2.5 mg to 20 mg given orally in 2 to 4 divided doses. The desired response may be achieved with as little as 2.5 mg or as much as 20 mg daily. A course of therapy of 2 to 4 weeks is usually adequate. Pediatric dosage should be individualized based on the child’s weight and response. Dosage adjustments may be necessary for patients with renal or hepatic impairment.

Side Effects and Adverse Reactions

Common side effects of oxandrolone include nausea, vomiting, headache, skin color changes, increased/decreased sexual interest, oily skin, hair loss, and acne. Less frequently, several other adverse effects have been reported. Refer to the product label for a comprehensive list of potential side effects. In a meta-analysis published in Current Medical Research and Opinion, the incidence of adverse events with oxandrolone was found to be low, with most events being mild in nature.

Special Precautions and Contraindications

Oxandrolone is contraindicated in patients with hypersensitivity to oxandrolone or any component of the formulation, carcinoma of the prostate or breast in male patients, carcinoma of the breast in females with hypercalcemia, and in pregnancy. Oxandrolone may cause fetal h arm when administered to a pregnant woman and is contraindicated in women who are or may become pregnant. It is not known whether oxandrolone is excreted in human milk. Because of the potential for serious adverse reactions in nursing infants, a decision should be made whether to discontinue nursing or to discontinue the drug.

Drug Interactions

Oxandrolone may interact with oral anticoagulants, increasing their effects and the risk of bleeding. Dosage of the anticoagulant may need to be decreased. Oxandrolone may also interact with insulin and other oral hypoglycemic agents, potentially requiring dosage adjustments. Concurrent use of oxandrolone with corticosteroids may increase the risk of edema. A study in the Oxandrolone_Disposition_and_armacokinetics/”>Ph armacokinetics_in.3.aspx”> Therapeutic Drug Monitoring journal reported that oxandrolone may decrease the clearance of warfarin, necessitating close monitoring of prothrombin times and INR.

Legal and Regulatory Status

Oxandrolone is classified as a Schedule III controlled substance in the United States under the Controlled Substances Act. It is available only by prescription from a licensed medical practitioner. The FDA has approved oxandrolone for adjunctive therapy to promote weight gain after weight loss following surgery, chronic infections, or severe trauma, and to offset the protein catabolism associated with prolonged corticosteroid administration.

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Oxandrolone is rapidly absorbed from the gastrointestinal tract. The drug undergoes extensive first-pass metabolism in the liver, with an oral bioavailability of around 97%. Peak plasma concentrations are reached within 1 to 3 hours after oral administration. Oxandrolone is extensively metabolized in the liver, primarily by reduction, oxidation, and conjugation. The terminal half-life is approximately 9 hours. About 28% of an oral dose is excreted in the urine within 24 hours, mostly as metabolites.

Brand Names and Generic Options

The original brand name of oxandrolone was Anavar, first introduced by Searle Laboratories in 1964. Oxandrolone is currently available in the United States under the brand name Oxandrin, marketed by BTG armaceutical/”>Ph armaceuticals. Generic oxandrolone is also available from various manufacturers.

Alternate Uses and Off-Label Applications

While not approved by the FDA for these indications, oxandrolone has been used off-label for various other purposes. These include aiding in the development of lean body mass in patients with wasting conditions such as HIV/AIDS, alcoholic hepatitis, and end-stage renal disease. Oxandrolone has also been used in an attempt to reduce muscle loss during space travel and to enhance athletic performance. However, such use is not recommended due to the potential for serious adverse effects and legal consequences.

Patient Counselling Information

Patients should be advised to take oxandrolone exactly as prescribed and not to exceed the recommended dose. The tablets should be taken with food or milk to minimize gastrointestinal upset. Patients should be informed about the potential side effects and advised to report any unusual symptoms to their healthcare provider. Women of childbearing potential should be cautioned to avoid becoming pregnant while taking oxandrolone. Regular follow-up visits and laboratory tests are necessary to monitor therapy.

Clinical Studies and Research

Several clinical studies have investigated the efficacy and safety of oxandrolone in various medical conditions. A Cochrane systematic review concluded that oxandrolone may be beneficial in promoting short-term weight gain in people with chronic obstructive pulmonary disease (COPD), but the long-term effects are uncertain. Another study published in the Reviews in Endocrine and Metabolic Disorders journal suggested that oxandrolone may be useful in treating osteoporosis and reducing bone pain.

Comparative Analysis with Other Anabolic Steroids

Oxandrolone is considered a relatively mild anabolic steroid compared to other drugs in this class. It has lower androgenic potency than testosterone and a higher anabolic to androgenic ratio, meaning it has more tissue-building effects relative to its masculinizing effects. This makes oxandrolone a preferred option for use in women and children. However, oxandrolone still carries the risk of adverse effects common to all anabolic steroids, such as liver toxicity and hormonal disturbances.

Historical Cases and Notable Uses

One notable case of oxandrolone use was in the treatment of the victims of the 1998 Nairobi embassy bombing. The drug was used to promote wound healing and recovery in survivors who had suffered severe injuries. Oxandrolone has also been studied as a potential treatment for various muscle-wasting conditions, including Duchenne muscular dystrophy and spinal muscular atrophy.

Patient and User Experiences

Patient experiences with oxandrolone vary depending on the individual and the condition being treated. Some users report significant weight gain and improved muscle strength, while others experience minimal benefits. Side effects such as acne, hair loss, and mood changes are commonly reported. Some patients also express concern about the long-term safety of using anabolic steroids. It is important for patients to discuss the potential risks and benefits with their healthcare provider before starting therapy.

Ethical and Controversial Issues

The use of anabolic steroids, including oxandrolone, in sports and bodybuilding has been a subject of controversy. Oxandrolone is banned by most major sports organizations as a performance-enhancing substance. The use of anabolic steroids for non-medical purposes is also illegal in many countries. There are concerns about the long-term health consequences of steroid abuse, as well as the ethical implications of using drugs to gain a competitive advantage.

Safety and Overdose Management

Overdose with oxandrolone can cause serious adverse effects, including liver damage, fluid retention, and masculinization in women. Symptoms of overdose may include nausea, vomiting, abdominal pain, yellowing of the skin or eyes, and swelling of the ankles or feet. In case of suspected overdose, supportive care should be provided, and the patient should be monitored for complications. There is no specific antidote for oxandrolone overdose.

Storage and Handling

Oxandrolone tablets should be stored at room temperature, between 20°C to 25°C (68°F to 77°F). The tablets should be kept in a tight, light-resistant container and protected from moisture. Oxandrolone should be handled with care, and any unused portion should be properly disposed of according to local regulations.

Related Compounds and Alternatives

Other anabolic steroids structurally related to oxandrolone include dihydrotestosterone ( DHT), nandrolone, and stanozolol. These drugs have similar anabolic effects but differ in their potency, side effect profiles, and route of administration. Non-steroidal alternatives for promoting weight gain and muscle growth include human growth hormone, insulin-like growth factor-1 (IGF-1), and selective androgen receptor modulators (SARMs). However, the safety and efficacy of these agents for such purposes have not been well established.

In conclusion, oxandrolone is a synthetic anabolic steroid with various medical applications, primarily in promoting weight gain and treating muscle wasting. While it is considered milder than some other anabolic steroids, oxandrolone still carries the risk of significant adverse effects and should only be used under medical supervision. The use of oxandrolone for non-medical purposes is illegal and potentially dangerous. Patients should be fully informed about the risks and benefits of oxandrolone therapy and closely monitored for any adverse reactions.