Abstract
Secretory diarrhea has a significant impact on morbidity and mortality worldwide and may be a predominant or minor component of pathogenesis in diarrhea of various etiologies. Crofelemer is a first-in-class antidiarrheal medication with unique inhibitory mechanisms at both the cystic fibrosis transmembrane conductance regulator and the calcium-activated chloride channels which are responsible for chloride secretion and subsequent luminal hydration. The efficacy of crofelemer has been investigated in patients with HIV-associated diarrhea, diarrhea of various infectious etiologies, as well as diarrhea-predominant irritable bowel syndrome. Crofelemer was approved by the FDA in December 2012 to treat diarrhea in HIV/AIDS patients on antiretroviral therapy. Crofelemer is not absorbed in the body and well-tolerated in small trials performed to date although long-term safety data is lacking. Crofelemer may be an important addition to the currently available drugs for the management of secretory diarrhea.
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