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• W4366083042 abstract "Summary Background Treatment of acid‐related disorders relies on gastric acid suppression. The percentage of time intragastric pH is >4 (pH >4 holding time ratio [HTR]) is important for healing erosive oesophagitis; and the pH >6 HTR is critical for eradication of Helicobacter pylori infection, as bacterial replication is active and antibiotic effectiveness is optimised. Vonoprazan, a potassium‐competitive acid blocker approved in the USA and other countries, suppresses gastric acid secretion in a predictable, rapid and consistent manner, extended over prolonged periods. Aim To explore the relationship between vonoprazan exposure and pH HTR through a pharmacokinetic/pharmacodynamic (PK/PD) model. Methods We pooled data from Phase 1 studies with intragastric pH measurements. Pharmacokinetic profiles were predicted for study participants using an existing population pharmacokinetic model. Pharmacokinetic and pharmacodynamic data were merged, and three direct‐link PK/PD models were derived and used to simulate pH HTRs with between‐participant variability for pH >4, >5 and >6, for vonoprazan doses of 20 mg once and twice daily. Results We used data from five Phase 1 studies to derive the PK/PD model. These included 245 participants (95.1% male, 50.6% Japanese and 49.4% non‐Asian). Pre‐dose, the mean pH >4 HTR was 6.4%, pH >5 3.2% and pH >6 1.2%. After 7 days of dosing, simulations predicted pH >4 HTRs of 89.7% and 98.1%, and pH >6 HTRs of 53.1% and 75.3%, for vonoprazan 20 mg once and twice daily, respectively. Conclusions Vonoprazan 20 mg once‐ and twice‐daily dosing demonstrated high, dose‐dependent, 24‐hour intragastric acid control in this PK/PD model, supporting clinical efficacy data in patients with acid‐related disorders." @default.
• W4366083042 created "2023-04-19" @default.
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• W4366083042 date "2023-04-17" @default.
• W4366083042 modified "2023-09-26" @default.
• W4366083042 title "A translational pharmacokinetic/pharmacodynamic approach supports optimal vonoprazan dosing for erosive oesophagitis and <i>Helicobacter pylori</i> infection" @default.
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• W4366083042 doi "https://doi.org/10.1111/apt.17510" @default.
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