Characterization of physicochemical properties of hydroxypropyl methylcellulose (HPMC) type 2208 and their influence on prolonged drug release from matrix tablets

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• 作者：S. Devjak Novak^a ; E. &Scaron ; porar^a ; S. Baumgartner^b ; F. Vre膷er^a ; ^b ; ^{franc.vrecer@krka.biz}
• 关键词：HPMC ; Particle-size ; NIR ; Calibration models ; SEM ; Drug release
• 刊名：Journal of Pharmaceutical and Biomedical Analysis
• 出版年：2012
• 期刊代码：65_07317085
• 类别：ch
• 出版时间：July, 2012
• 卷：66
• 期：Complete
• 页码：136-143
• 文件大小：723 K

摘要

The key physicochemical properties of functional excipients should be identified, and the influence of their variability on the properties of the final dosage form should be evaluated during the development phase. Excipients produced by different manufacturers and/or by different manufacturing processes should have comparable properties. Hydroxypropyl methylcellulose (HPMC) with a high molecular weight is a functional excipient often used in solid matrix systems with prolonged release of active pharmaceutical ingredients (API). This study investigates whether HPMC manufactured by two manufacturers using different chemical procedures differs in particle-size distribution, particle shape, particle morphology, chemical composition, and dissolution of diclofenac sodium as a model drug. NIR spectroscopy was introduced and calibration models were developed to detect physical differences among HPMC batches from two different origins. The physical differences between HPMC samples were additionally confirmed with scanning electron microscopy (SEM), gas chromatography (GC) measurements, and dissolution testing of hydrophilic matrix tablets. Our results prove that, even if HPMC polymers manufactured from two different sources comply with the pharmacopeial specification, they significantly differ in physicochemical properties and thus influence the properties of the formulated dosage forms.