An explosion of recent studies from multiple university medical centers recently exposed that the use of the prescription drug Elmiron® can result in patients’ vision failure, up to and including legal blindness.   Elmiron® is the brand name for pentosane polysulfate sodium (“PPS”), a drug manufactured and distributed by Janssen Pharmaceuticals.   It has been marketed for nearly twenty-five years and resulted in billions of dollars of sales for Janssen.   The earliest clinical trials for Elmiron® from the 1990s revealed not only dubious efficacy, but also a hos