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  • Title: Tenapanor for constipation-predominant irritable bowel syndrome.
    Author: Siddiqui S, Cash BD.
    Journal: Drugs Today (Barc); 2020 Mar; 56(3):203-210. PubMed ID: 32282867.
    Abstract:
    Irritable bowel syndrome (IBS) is among the most common gastrointestinal disorders encountered in primary and secondary care and is associated with impaired quality of life, increased healthcare utilization, and significant costs to patients and society. There are three primary phenotypes of IBS, categorized according to stool pattern: IBS with diarrhea (IBS-D), IBS with constipation (IBS-C) and IBS with a mixed bowel pattern (IBS-M). The treatment approach to all forms of IBS is typically hierarchal, with initial therapies consisting of dietary and lifestyle modifications. When these interventions are impractical or ineffective, pharmacotherapy with over-the-counter and prescription therapies is often employed. Tenapanor is a locally acting, minimally absorbed, selective small-molecule inhibitor of the intestinal sodium/hydrogen exchanger 3 (NHE3) that was approved in September 2019 by the U.S. Food and Drug Administration (FDA) for IBS-C. This agent works by increasing the sodium level in the intestinal lumen and promoting the efflux of fluid into the gut lumen to maintain osmotic balance in addition to having an antinociceptive effect. Tenapanor has been shown to improve bowel movement frequency/form and abdominal pain in patients with IBS-C. This article will elaborate on the clinical development program for tenapanor for this indication.
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