JOURNAL ARTICLE
RANDOMIZED CONTROLLED TRIAL
RESEARCH SUPPORT, NON-U.S. GOV'T
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Developing Quantitative In Vitro-In Vivo Correlation for Fenofibrate Immediate-Release Formulations With the Biphasic Dissolution-Partition Test Method.

This study is to evaluate 3 fenofibrate (FEN) formulations including Fournier® 200 mg capsule, Lipidil® 145 mg tablet, and a clinical HME 160 mg tablet by an in vitro biphasic method. Key experimental parameters were evaluated including the selection of biorelevant media, the United States Pharmacopeia IV flow rate, and the United States Pharmacopeia paddle speed. Varying the hydrodynamic condition resulted in a significant impact on FEN concentration time profiles in both aqueous and octanol phases for these formulations. In vivo pharmacokinetic profiles of the HME tablet, the Lipidil tablet, and Fournier capsule under the fasting and low-fat fed states are reported. Their corresponding absorption-time profiles were obtained through deconvolution by the Wagner-Nelson method. When fed state simulated intestinal fluid version 2 was used, the partitioned FEN amount-time profiles in octanol from the 3 formulations under an appropriate hydrodynamic condition exhibited a good agreement with their in vivo absorbed amount-time profiles, permitting a quantitative in vitro-in vivo correlation. When fasted state simulated intestinal fluid version 2 was used, partitioned FEN amounts into octanol from these formulations are significantly lower than those from in vivo data. Although no food effect was observed for both HME and Lipidil tablets, the positive food effect of the Fournier capsules significantly overestimated by the biphasic test.

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