Ardelyx, Inc. is a biopharmaceutical company. The Company focuses on discovery, development, and commercialization of advanced medicines that meet significant unmet medical needs. The Company's product pipeline includes IBSRELA (tenapanor), XPHOZAH, RDX013 Program, and RDX020 Program. Tenapanor is a small molecule therapy in development for the treatment of hyperphosphatemia, a condition of elevated levels of phosphate in the blood, common among patients with chronic kidney disease (CKD) on dialysis. Tenapanor has a mechanism of action and acts locally in the gut to inhibit the sodium hydrogen exchanger 3 (NHE3). IBSRELA is developed for the treatment of patients with irritable bowel syndrome with constipation (IBS-C). XPHOZAH is a medicine for the control of serum phosphorus in adult patients with CKD on dialysis. RDX013 Program is a small molecule potassium secretagogue program for the treatment of hyperkalemia. RDX020 Program is a small molecule for treating metabolic acidosis.