Vonoprazan is a potassium-competitive acid blocker (PCAB) that inhibits H<sup>+</sup>, K<sup>+</sup>-ATPase-mediated gastric acid secretion. PCABs represent an alternative to proton-pump inhibitors for the treatment of acid-related disorders. Unlike proton-pump inhibitors, PCABs are not affected by CYP2C19 genetic polymorphisms and do not require acid-resistant formulations.[A253702] Furthermore, vonoprazan is 350-times more potent than the proton-pump inhibitor [lansoprazole], thanks to its ability to accumulate in the gastric corpus mucosa, specifically in the parietal cells.[A253707] In February 2015, vonoprazan was first marketed in Japan for the treatment of acid-related disorders and as an adjunct to _Helicobacter pylori_ (_H. pylori_) eradication.[A253702] In May 2022, the FDA approved the use of vonoprazan in a co-packaged product containing amoxicillin and clarithromycin for the treatment of _H. pylori_ infection.[L41695] Studies have shown that the concomitant use of vonoprazan, amoxicillin, and clarithromycin leads to an _H. pylori_ eradication rate of approximately 90%.[A253742]
Vonoprazan is indicated for the following conditions: - for healing of all grades of erosive esophagitis and relief of heartburn associated with erosive esophagitis in adults.[L51224] - to maintain healing of all grades of erosive esophagitis and relief of heartburn associated with erosive esophagitis in adults.[L51224] - for the relief of heartburn associated with non-erosive gastroesophageal reflux disease in adults.[L51224] - in combination with [amoxicillin] and [clarithromycin] for the treatment of Helicobacter pylori (_H. pylori_) infection in adults.[L41695, L51224] - in combination with amoxicillin for the treatment of H. pylori infection in adults.[L51224]
Drug Info/Drug Targets: DrugBank 3.0: a comprehensive resource for 'omics' research on drugs. Knox C, Law V, Jewison
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