Cyproterone Acetate
Cyproterone Acetate is a synthetic steroid hormone with both anti-androgen and progestational properties. It works by blocking androgen receptors and reducing testosterone production, making it useful for conditions driven by male sex hormones. This medication is prescribed for androgen-dependent conditions in both men and women, as well as in hormone therapy for transgender individuals.
Cyproterone Acetate is an anti-androgen medication used to treat conditions caused by excess male hormones, such as prostate cancer, hirsutism, and acne.
Key facts at a glance
- RxNorm
- 22054
- Generic
- Cyproterone Acetate
- Class
- pin-variant
- Brands
- —
- Availability
- rx
- Lactation
- unknown
- Routes
- —
- Forms
- —
- 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.
Treats androgen-dependent conditions including prostate cancer, severe hirsutism and acne in women, male pattern baldness, and is used in feminizing hormone therapy for transgender women. May also be prescribed for hypersexuality in men to reduce libido.
Blocks androgen receptors at target tissues, preventing male sex hormones (testosterone and DHT) from exerting their effects. Also suppresses gonadotropin secretion, which reduces testosterone production by the testes.
Requires regular liver function monitoring due to hepatotoxicity risk. Contraindicated in pregnancy, liver disease, and history of thromboembolic events. Can cause feminizing effects in male patients including breast enlargement. May interact with other hormonal medications. Should only be used under specialist supervision.
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