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- W2009437368 abstract "Ulipristal acetate is a novel selective progesterone receptor modulator for the treatment of benign gynecological conditions such as uterine myoma. As a Biopharmaceutical Classification System (BCS) II compound, it is highly soluble at low pH but has low solubility at neutral conditions. Esomeprazole, a proton pump inhibitor used widely for treatment of gastric and duodenal ulcers, efficiently increases gastric pH. Thus, the aim of this study was to determine the effects of esomeprazole on the pharmacokinetics of ulipristal acetate.This was a nonrandomized, single sequence, 2 period, open, study in 18 healthy female subjects. Subjects received oral ulipristal acetate tablets (10 mg) once on Days 1 and 13 and daily esomeprazole administrations (20 mg) from Days 9 through 14.Co-administration of esomeprazole decreased geometric mean Cmax of ulipristal acetate by 65% (geometric mean ratio point estimate (90% CI): 0.35 (0.28 - 0.42)), and delayed median tmax from 0.75 to 1.00 h (Hodges-Lehmann estimate of difference (90% CI): tmax 0.63 (0.25 - 1.25)) but had minor effects on AUCs of +15% and +11% (geometric mean ratio point estimates (90% CI): AUC0-t 1.15 (1.02 - 1.31) and AUC0-∞ (1.11 (0.98 - 1.27)), respectively. A total of 6 adverse events were reported by 4 subjects, none of them being serious.Concomitant use of ulipristal acetate with esomeprazole at therapeutic concentrations led to a modified absorption rate while exposure in terms of AUC remained close to bioequivalence limits. In the context of chronic administration of ulipristal acetate, no clinically significant effects are expected from co-administration with drugs increasing gastric pH." @default.
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- W2009437368 date "2013-01-01" @default.
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- W2009437368 title "Changes in gastric pH and in pharmacokinetics of ulipristal acetate a drug-drug interaction study using the proton pump inhibitor esomeprazole" @default.
- W2009437368 doi "https://doi.org/10.5414/cp201789" @default.
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