Effect of raw material variability of glipizide on the in vitro dissolution rate and in vivo bioavailability performance: The importance of particle size  

作　　者：Chenyao Zhao Chan Jin Hailing Gao Liyuan Wang Hongzhuo Liu Zhonggui He 

机构地区：[1]Shenyang Pharmaceutical University

出　　处：《Asian Journal of Pharmaceutical Sciences》2019年第2期165-173,共9页亚洲药物制剂科学（英文）

基　　金：supported by National Science and Technology Major Projects for "Major New Drugs Innovation and Development"(No.2017ZX09101-001-005,Beijing,China)

摘　　要：The objective of this study was to understand the impact of active pharmaceutical ingredients(API) particle size on a re-developed generic product of glipizide and to improve its formulation so that it exhibits bioequivalent to that of the reference listed drug(RLD). Two commercial batches of APIs(API-1 and API-2) with the same polymorphism and one batch of home-made APIs(API-3) with super-small particle size were used in the present study.The in vitro dissolution profiles of the tested formulations were compared with the RLD in a series of dissolution media. Then, the impact of particle size on in vivo absorption was evaluated in Beagle dogs. Compared with the RLD, formulation A with larger API size showed slower dissolution in p H 6.0 and 7.4 medium, resulting bioinequivalent with the RLD. Conversely, formulation B with smaller API size demonstrated similar in vitro dissolution profiles with the RLD and thus exhibited bioequivalent in the present study. Furthermore, formulation C with super small particle size still exhibited identical oral absorption although rapid dissolution was observed in the tested condition. Herein, it indicated that 2–5 μm might be defined as the "inert size range" of glipizide for ensuring the bioequivalence with the RLD. The results in the present study might help to obtain a better understanding of the variability in raw materials for oral absorption, develop a bioequivalent product and thus post-market quality control.The objective of this study was to understand the impact of active pharmaceutical ingredients(API) particle size on a re-developed generic product of glipizide and to improve its formulation so that it exhibits bioequivalent to that of the reference listed drug(RLD). Two commercial batches of APIs(API-1 and API-2) with the same polymorphism and one batch of home-made APIs(API-3) with super-small particle size were used in the present study.The in vitro dissolution profiles of the tested formulations were compared with the RLD in a series of dissolution media. Then, the impact of particle size on in vivo absorption was evaluated in Beagle dogs. Compared with the RLD, formulation A with larger API size showed slower dissolution in p H 6.0 and 7.4 medium, resulting bioinequivalent with the RLD. Conversely, formulation B with smaller API size demonstrated similar in vitro dissolution profiles with the RLD and thus exhibited bioequivalent in the present study. Furthermore, formulation C with super small particle size still exhibited identical oral absorption although rapid dissolution was observed in the tested condition. Herein, it indicated that 2–5 μm might be defined as the "inert size range" of glipizide for ensuring the bioequivalence with the RLD. The results in the present study might help to obtain a better understanding of the variability in raw materials for oral absorption, develop a bioequivalent product and thus post-market quality control.

关 键 词：GLIPIZIDE Particle size Product quality BIOEQUIVALENCE study DISSOLUTION 

分 类 号：R[医药卫生]