What Is Anavar?

Anavar, the brand name for oxandrolone, is a synthetic anabolic-androgenic steroid. Scientists first developed it in the 1960s to promote weight gain after surgery, trauma, or infection. Medically, it still treats limited conditions. These include offsetting protein catabolism from prolonged corticosteroid use and relieving bone pain from osteoporosis. However, the FDA discontinued approved forms in the United States due to safety concerns.

How Does It Work?

Oxandrolone acts like testosterone. It binds to androgen receptors and stimulates muscle growth and protein synthesis. This mechanism drives its popularity among bodybuilders. They seek lean muscle gains with less water retention than other steroids. The compound has a high anabolic-to-androgenic ratio. This means it produces more muscle-building effects relative to masculinizing side effects. That characteristic has built its reputation as a “mild” steroid.

Why Is This Reputation Misleading?

Oxandrolone is a 17-alpha-alkylated steroid. This structural feature makes it orally active but also hepatotoxic. Liver damage, including cholestatic jaundice and rare peliosis hepatis, has occurred even at therapeutic doses. The drug also reduces HDL cholesterol and increases LDL cholesterol. This elevates cardiovascular risk. Hormonal suppression is another significant concern. Oxandrolone inhibits natural testosterone production through negative feedback on the hypothalamic-pituitary-gonadal axis. This may cause erectile dysfunction, low libido, and mood disturbances during and after use.

What Are the Legal and Safety Resources?

For legal and regulatory information, refer to the DEA’s Controlled Substances Act and FDA drug safety communications. For harm reduction resources, see the Harm Reduction Coalition and SAMHSA’s National Helpline. Additional clinical data is available through PubMed and DailyMed.

Who Faces the Greatest Risks?

Women face particular risks. These include virilization—voice deepening, facial hair growth, and clitoromegaly. Some of these effects may be irreversible. In adolescents, anabolic steroids can prematurely close growth plates. This compromises final adult height.

What Is Its Legal Status?

Anavar is a Schedule III controlled substance in the U.S. It is a prescription-only medicine in many countries, including the UK and Australia. Possession without prescription is illegal there. Despite its medical origins, non-prescription use carries substantial health risks. These risks outweigh any perceived benefits.

MeSH D010074

Anavar