European Commission grants extended approval for Xtandi to treat metastatic castration-sensitive prostate cancer.- Astellas.

Astellas Pharma Inc. announced that the European Commission (EC) has approved an additional indication for the oral once-daily therapy Xtandi (enzalutamide) for adult men with metastatic hormone-sensitive prostate cancer (mHSPC, also known as metastatic castration-sensitive prostate cancer or mCSPC). Men diagnosed with mHSPC tend to have a poor prognosis, with a median survival of approximately 3-4 years, underscoring the need for new treatment options. With this indication, enzalutamide is now the only oral treatment approved by the EC to treat three distinct types of advanced prostate cancer — non-metastatic and metastatic castration-resistant prostate cancer (CRPC) and mHSPC. The EC approval is based on results from the pivotal Phase III ARCHES trial which evaluated enzalutamide in men with mHSPC. Data from the ARCHES trial showed enzalutamide plus androgen deprivation therapy (ADT) significantly reduced the risk of radiographic progression or death by 61% versus placebo plus ADT in men with mHSPC (n=1,150; hazard ratio [HR]=0.39 [95% confidence interval (CI): 0.30-0.50]; P<0.0001).3.>