Abstract
Potassium-competitive acid blockers (P-CABs) constitute a relatively new class of gastric acid-suppressing drugs. Among this class, vonoprazan is the first to have been approved in the United States. However, some P-CABs including vonoprazan, tegoprazan and fexuprazan have been available in other countries since at least 2014. The first aim of this article is to review pharmacological differences between P-CABs that are currently approved or in development with proton pump inhibitors (PPIs). The specific focus thereafter is on the likely role of P-CABs in the treatment of different manifestations of gastroesophageal reflux disease (GERD). Multiple clinical trials have compared P-CABs with PPIs in erosive esophagitis. Additional trials have compared P-CABs with placebo in non-erosive reflux disease. Relevant results are reviewed and inferences drawn for their use in the US. Lastly, consideration is given to additional, potential uses of P-CABs in the broader spectrum of GERD and some suggestions made for future research initiatives.
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