Vonoprazan in the Treatment of Gastroesophageal Reflux

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Narawadee Kanchanindu
Tanasak Sugsomsote

Abstract

Vonoprazan, a potassium-competitive acid blockers (P-CABs), was approved in Japan in 2014 and in Thailand in 2018 for the treatment and prevention of diseases caused by excessive secretion of gastric acid. Some of its pharmacokinetic properties differ from proton-pump inhibitors (PPIs) i.e., more rapid onset and a longer inhibition duration of acid secretion, making it suitable for the treatment of recurrent acid reflux. It also is stable in acid condition, and not destroyed by gastric acid. The drug is primarily metabolized in liver by CYP3A4, unlike the CYP2C19-metabolized PPIs, with polymorphisms leading to inter-individual variation of responses to the PPIs. Systematic reviews and meta-analyses directly comparing the efficacy and safety of vonoprazan 20 mg versus PPIs for the treatment of gastroesophageal reflux showed that efficacy and safety of vonoprazan 20 mg were not inferior to those of PPIs, but vonoprazan was significantly more effective than PPIs. The safety of the use of vonoprazan and PPIs was similar. Cost-effectiveness analysis of vonoprazan 20 mg versus lansoprazole 30 mg in the treatment of acute reflux concluded that P-CABs was more cost-effective. However, the study in this aspect is quite limited, cost-effectiveness of the treatment could not be definitely concluded.

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Research Articles

References

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