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Ranking Itraconazole Formulations Based on the Flux through Artificial Lipophilic Membrane

Tsinman, Konstantin and Tsinman, Oksana and Lingamaneni, Ram and Zhu, Saijie and Riebesehl, Bernd and Grandeury, Arnaud and Juhnke, Michael and Van Eerdenbrugh, Bernard (2018) Ranking Itraconazole Formulations Based on the Flux through Artificial Lipophilic Membrane. Pharmaceutical Research, 35 (8). ISSN 1573904X

Abstract

Purpose: The goal of the study was to evaluate a miniaturized dissolution-permeation apparatus (μFLUX™ apparatus) for its ability to benchmark several itraconazole (ITZ) formulations for which in vivo PK data was available in the literature. Method: Untreated and micronized powders of ITZ and various enabling formulations of ITZ (commercial Sporanox® solid dispersion, a Soluplus®-based solid dispersion and a nanosuspension) were introduced to the donor compartment of μFLUX™ apparatus. Donor and acceptor chambers were divided from each other by a lipophilic membrane. In addition to the flux evaluations, changes in solid state as a function of time were investigated to gain further insight into the flux changes observed over time for the solid dispersion formulations. Results: Initial flux values from Sporanox®, the nanosuspension and the micronized ITZ showed ratios of 52/4/1 with a decreasing flux from nanosuspension and both solid dispersions after 2.5–3 h. Although the initial flux from the Soluplus® formulation was 2.2 times lower than the one observed for Sporanox®, the decrease in flux observed was milder and became ~ 2 times higher than Sporanox® after approximately 2.5 h. The total amounts of ITZ in the receiver compartment after 240 min showed the same rank order as the rodent AUCs of these formulations reported in literature. Conclusions: It was demonstrated that in vitro flux measurements using lipophilic artificial membranes could correctly reproduce the rank order of PK results for ITZ formulations. The drop in flux over time for solid dispersions could be backed by experimental indications of crystallization.

Item Type: Article
Keywords: dissolution-permeation Flux itraconazole nanosuspension solid dispersion
Date Deposited: 01 Aug 2018 00:45
Last Modified: 01 Aug 2018 00:45
URI: https://oak.novartis.com/id/eprint/35440

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