THURSDAY, May 26 (HealthDay News) -- For men with advanced hormone-resistant prostate cancer who have also failed chemotherapy, the new drug Zytiga (abiraterone acetate) along with the steroid prednisone appears to boost survival, researchers report.
Based on data from the ongoing clinical trial, Zytiga was approved by the U.S. Food and Drug Administration in April. It works by inhibiting the production of the male hormone testosterone, which promotes the growth of cancer cells. In this regard, the drug mimics hormone therapy.
Zytiga "prolonged overall survival in this patient population that had extremely limited therapeutic options after chemotherapy," lead researcher Dr. Fred Saad, chief of urology at Notre-Dame Hospital in Montreal, said during a Monday morning press conference.
Men taking the drug combination had an average survival of 14.8 months, compared with 10.9 months for men taking a placebo.
"Abiraterone represents a valuable treatment option for patients with metastatic, castration [hormone]-resistant prostate cancer who had been treated previously with chemotherapy, with very manageable treatment-related toxicity," Saad said.
The study was published in the May 26 issue of the New England Journal of Medicine. The findings had also been presented May 16 at the American Urological Association's annual meeting, in Washington D.C.
The study included 1,195 men with prostate cancer who did not respond to hormone therapy and had failed earlier chemotherapy. The researchers, from 147 hospitals across 13 countries, randomly assigned the men to take either Zytiga plus prednisone, or a placebo.
The drug combination was well tolerated and resulted in less fatigue, back pain and spinal compression among the men taking it, compared with the placebo, Saad said.
The most common side effects among those taking Zytiga and prednisone were lowe
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