Fluoxymesterone
Fluoxymesterone is a synthetic androgen (male sex hormone) used primarily to treat androgen deficiency conditions in men and hormone-sensitive breast cancer in women. It works by binding to androgen receptors to produce masculine effects and promote protein synthesis. This medication is typically prescribed for hypogonadism, delayed puberty in males, and certain cases of advanced breast cancer.
A synthetic androgen hormone used to treat low testosterone in men and hormone-sensitive breast cancer in women.
Key facts at a glance
- ATC
- G03BA01
- RxNorm
- 4494
- Generic
- Fluoxymesterone
- Class
- atc-g03
- Brands
- —
- Availability
- rx
- Lactation
- unknown
- Routes
- oral
- Forms
- tablet
- Regions
- US, EU, CN, JP
- Monitoring
- —
This page is for informational purposes only.
Do not use this information to diagnose yourself or to replace a physician's advice. Always consult a qualified healthcare provider before starting, stopping, or changing any medication. If you believe you are experiencing a medical emergency, call your local emergency number immediately.
Treatment of male hypogonadism (low testosterone), delayed puberty in adolescent males, and metastatic breast cancer in postmenopausal women.
Fluoxymesterone binds to androgen receptors in target tissues, exerting androgenic effects that promote masculine characteristics and anabolic effects that support protein synthesis and nitrogen retention.
This medication is hepatotoxic (liver-damaging) due to its 17-alpha-alkylated structure. In women, it may cause virilizing effects. It can also affect lipid profiles and is a controlled substance. Regular monitoring of liver function and hormonal levels is required during treatment.
Official drug label
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This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.
This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.
If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.
Medically reviewed by WellAlly Editorial Team Last reviewed August 25, 2026. · Read our editorial policy