The Effect of Food on the Pharmacokinetics of the Potassium-Competitive Acid Blocker Vonoprazan

Abstract

Herein, we report a food-effect study of vonoprazan, an oral potassium-competitive acid blocker. In a phase 1, randomized, open-label, crossover study, healthy subjects received a single 20-mg dose of vonoprazan either following an overnight fast or 30 minutes after a high-fat breakfast. Plasma vonoprazan levels were determined at 0 hour and at 17 subsequent assessment points up to 48 hours after dosing. After a 5-day washout, subjects received a second 20-mg vonoprazan dose in the alternative fed/fasted state (identical process repeated). Twenty-four subjects completed the study. Vonoprazan exposure was not meaningfully affected by food. Geometric mean ratios for maximum concentration, area under the concentration-time curve from time 0 to 24 hours, and area under the plasma concentration–time curve extrapolated to infinity obtained under fed and fasting conditions were 1.05 (90% confidence interval, 0.98-1.12), 1.13 (1.09-1.18), and 1.15 (1.11-1.19), respectively. Four subjects experienced 6 adverse events that were all mild and considered unrelated to the study drug. Vonoprazan can be administered without regard to food intake.