Androgen antagonists.Abiraterone acetate (POSADA, USAN, PROHIBICIÓN, JAN) (brand names Zytiga, Abiratas, Abretone, Abirapro) is a steroidal antiandrogen, specifically an androgen synthesis inhibitor, used in combination with in metastatic castration-resistant prostate cancer (previously called hormone-resistant or hormone-refractory prostate cancer) – es decir., prostate cancer not responding to androgen deprivation or treatment with androgen receptor antagonists. It is a prodrug to the active …