Tenapanor: First Approval

Drugs. 2019 Nov;79(17):1897-1903. doi: 10.1007/s40265-019-01215-9.


The selective sodium hydrogen exchanger 3 (NHE3) inhibitor tenapanor is being developed by Ardelyx Inc. for the treatment of constipation-predominant irritable bowel syndrome (IBS-C) [under the tradename IBSRELA®] and for hyperphosphataemia in patients with chronic kidney disease (CKD) on dialysis or with end stage renal disease (ESRD). Based on positive results from the phase III T3MPO trial program, tenapanor was recently approved in the USA for the treatment of IBS-C in adults. This article summarises the milestones in the development of tenapanor leading to this first approval.

Publication types

  • Review

MeSH terms

  • Adult
  • Clinical Trials, Phase III as Topic
  • Drug Approval*
  • Humans
  • Hyperphosphatemia / drug therapy*
  • Irritable Bowel Syndrome / drug therapy*
  • Isoquinolines / pharmacology*
  • Kidney Failure, Chronic / drug therapy*
  • Molecular Conformation
  • Renal Insufficiency, Chronic / drug therapy*
  • Sodium-Hydrogen Exchanger 3 / antagonists & inhibitors*
  • Sulfonamides / pharmacology*


  • Isoquinolines
  • SLC9A3 protein, human
  • Sodium-Hydrogen Exchanger 3
  • Sulfonamides
  • tenapanor