*The XTANDI Patient Savings Program ("Program") is for eligible patients with commercial prescription insurance for XTANDI. You are not eligible for this Program if your prescription claims are reimbursed, in whole or in part, by any state or federal government program, including, but not limited to, Medicaid, Medicare, Medicare Part D, Medigap, DoD, VA, TRICARE, CHAMPUS, Puerto Rico Government Insurance, or any state patient or pharmaceutical assistance program. This Program is void where prohibited by law. Certain rules and restrictions apply. Astellas reserves the right to revoke, rescind, or amend this offer without notice.. XTANDI has been studied in men with advanced prostate cancer that no longer responds to treatment that lowers testosterone. In a study where the cancer had not spread to other parts of the body, XTANDI lowered the chance of prostate cancer progression by 71%..