Ardelyx Inc. is preparing to join the small group of sponsors challenging US FDA complete response letters through the formal dispute resolution process – a process that sees more appeals denied than accepted, but that nonetheless can offer valuable (if not always financially feasible) advice from the agency on how to address clinical evidence problems.
Ardelyx’ tenapanor received a CRL in June 2021 for an NDA for control of serum phosphorus in adults with chronic...






