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Olaparib tablet formulation: effect of food on the pharmacokinetics after oral dosing in patients with advanced solid tumours

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Ruth Plummer, Helen Swaisland, Karin Leunen, Carla M L van Herpen, Guy Jerusalem, Jacques De Grève, Martijn P Lolkema, Patricia Soetekouw, Morten Mau-Sørensen, Dorte Nielsen, James Spicer, Anitra Fielding, Karen So, Wendy Bannister, L Rhoda Molife

Original languageEnglish
Pages (from-to)723-9
Number of pages7
JournalCancer Chemotherapy and Pharmacology
Volume76
Issue number4
DOIs
Publication statusPublished - Oct 2015

King's Authors

Abstract

BACKGROUND: The oral PARP inhibitor olaparib has shown efficacy in patients with BRCA-mutated cancer. This Phase I, open-label, three-part study (Parts A-C) in patients with advanced solid tumours evaluated the effect of food on the pharmacokinetics (PK) of olaparib when administered in tablet formulation.

METHODS: PK data were obtained in Part A using a two-treatment period crossover design; single-dose olaparib 300 mg (two 150 mg tablets) was administered in two prandial states: fasted and fed. In Part B, patients received olaparib tablets (300 mg bid) for 5 days under fasting conditions; in Part C, patients were allowed continued access to olaparib. Safety was assessed throughout, with data reported for Parts A and B.

RESULTS: A total of 60 and 56 patients were evaluable for safety and PK analyses, respectively; 57 patients entered Part B. Rate of olaparib absorption was slower in the presence of food (t max delayed by 2.5 h), resulting in a statistically significant ~21 % decrease in peak plasma exposure (C max) [ratio of geometric means (90 % CI), 0.79 (0.72, 0.86)] but only a marginal increase in olaparib absorption (AUC0-∞) [ratio of geometric means (90 % CI), 1.08 (1.01, 1.16)]. The point estimate and 90 % CI for the AUC0-∞ treatment ratio were within pre-defined bioequivalence limits (0.80-1.25). Adverse event data were consistent with the known safety profile of olaparib.

CONCLUSIONS: Results of this study showed that a high-fat meal decreases the rate of absorption and peak exposure to olaparib 300 mg tablets, although in the absence of an effect on the extent of olaparib absorption.

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