Oct 17 (Reuters) - The U.S. Food and Drug Administration (FDA) has approved Ardelyx's drug to treat high phosphate levels in patients with chronic kidney disease (CKD), the company said on Tuesday, more than two years after it was initially rejected.

(Reporting by Mariam Sunny, Khushi Mandowara and Leroy Leo in Bengaluru; Editing by Shinjini Ganguli)