Pfizer's Talzenna with Xtandi Shows Significant Results in Prostate Cancer Study
Pfizer announced detailed results from the Phase 3 Talapro-3 study of Talzenna, an oral poly ADP-ribose polymerase inhibitor, in combination with Xtandi, an androgen receptor pathway inhibitor, in men with homologous recombination repair gene-mutated metastatic castration-sensitive prostate cancer, mCSPC, also known as metastatic hormone-sensitive prostate cancer, mHSPC. These results will be presented in a late-breaking oral presentation at the 2026 American Society of Clinical Oncology, ASCO, Annual Meeting and simultaneously published in The New England Journal of Medicine. Talzenna plus Xtandi demonstrated a 52% reduction in the risk of radiographic progression or death compared to placebo plus Xtandi. At three years, radiographic progression-free survival rates were estimated at 77% in patients treated with Talzenna plus XTANDI versus 56% in patients treated with placebo plus Xtandi. With a median follow-up of over 37 months, median rPFS was not reached in the Talzenna plus Xtandi arm and was 46 months with placebo and Xtandi.