Ampicillin
Yonsa is a brand-name medication containing abiraterone acetate, used to treat metastatic castration-resistant prostate cancer (mCRPC) in adult men. It works by inhibiting an enzyme involved in androgen production, thereby reducing hormone levels that fuel cancer growth. The medication is typically used in combination with prednisone and is part of a class of drugs called CYP17 inhibitors.
Yonsa is a prescription prostate cancer medication that reduces androgen production to slow cancer growth.
Key facts at a glance
- RxNorm
- 2046580
- Generic
- Yonsa
- Class
- brand-name
- 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.
Treatment of metastatic castration-resistant prostate cancer (mCRPC) in adult men. May also be used for metastatic castration-sensitive prostate cancer (mCSPC). Always used in combination with prednisone.
Contains abiraterone acetate, which inhibits the CYP17 enzyme (17α-hydroxylase/C17,20-lyase). This blocks a key step in androgen biosynthesis, reducing testosterone and other androgen levels that can promote prostate cancer growth.
Must be taken on an empty stomach (at least 1 hour before or 2 hours after eating). Common side effects may include hypertension, fatigue, hypokalemia, and fluid retention. Regular blood monitoring is required. Contraindicated for use in women who are or may become pregnant. May interact with other medications; inform your doctor of all current medications.
Official drug label
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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