Unlock stock picks and a broker-level newsfeed that powers Wall Street.

Ardelyx to Share a Post-Hoc Analysis of the OPTIMIZE Study Supporting XPHOZAH® (tenapanor) at the National Kidney Foundation Spring Clinical Meetings

In This Article:

Ardelyx, Inc.
Ardelyx, Inc.

WALTHAM, Mass., March 31, 2025 (GLOBE NEWSWIRE) -- Ardelyx, Inc. (Nasdaq: ARDX), a biopharmaceutical company founded with a mission to discover, develop and commercialize innovative, first-in-class medicines that meet significant unmet medical needs, today announced that an abstract detailing a post-hoc analysis of the OPTIMIZE Study, an open-label clinical trial of XPHOZAH ® (tenapanor), was accepted as a poster presentation at the National Kidney Foundation (NKF) Spring Clinical Meetings, to be held April 10-13, 2025, in Boston.

XPHOZAH, the first and only phosphate absorption inhibitor (PAI), is approved by the U.S. Food and Drug Administration to reduce serum phosphorus in adults with chronic kidney disease (CKD) on dialysis as add-on therapy in patients who have an inadequate response to phosphate binders or who are intolerant of any dose of phosphate binder therapy. XPHOZAH offers a different mechanism of action that blocks phosphate absorption at the primary pathway and is administered as a single tablet taken twice daily.

OPTIMIZE was a randomized, open label study, which included 330 patients with chronic kidney disease (CKD) on dialysis with hyperphosphatemia. The study was designed to evaluate different methods of initiating XPHOZAH to optimize phosphorus management in both binder-naïve and binder-treated patients.

Title: Tenapanor-Treated Patients Using Over-the-Counter Antidiarrheal Agents Saw Decreased Stool Frequency and Improved Stool Consistency
Authors: Steven Fishbane, Suling Zhao, Susan Edelstein, Yang Yang, David Spiegel
Poster Number: G-310
Date/Time: April 10, 2025, from 5:15 to 7:30 PM EDT

Information regarding NKF Spring Clinical Meetings, including the presentation abstract, can be found here.

In addition to the poster presentation during NKF Spring Clinical Meetings, Ardelyx is sponsoring an Exhibitor Showcase titled: “A Different Perspective on Hyperphosphatemia Management: Evaluating Current Strategies” on April 11, 2025, from 12:00-12:35 PM EDT, where Dr. Vincent Carsillo, will discuss first-in-class PAI, XPHOZAH. The presentation will review the XPHOZAH mechanism of action, efficacy and safety data from the Phase 3 clinical trial program and will include a discussion about the clinical application of XPHOZAH as add-on therapy for the many dialysis patients on a phosphate binder with serum phosphorus levels above guideline-established targets.

About XPHOZAH® (tenapanor)
XPHOZAH, discovered and developed by Ardelyx, is a first-in-class, phosphate absorption inhibitor with a differentiated mechanism of action that acts locally in the gut to inhibit the sodium hydrogen exchanger 3 (NHE3), thereby reducing phosphate absorption through the paracellular pathway, the primary pathway of phosphate absorption. XPHOZAH is a single tablet, taken twice daily. Diarrhea was the most common side effect experienced by patients taking XPHOZAH in clinical trials. Please see additional full Prescribing Information.