Abstract
Mannitol and lactose are commonly used fillers in pharmaceutical tablets, available in several commercial grades that are produced using different manufacturing processes. These grades significantly differ in particulate and powder properties that impact tablet manufacturability. Choice of sub-optimum type or grade of excipient in tablet formulation can lead to manufacturing problems and difficulties, which are magnified during a continuous manufacturing process. Previous characterization of tableting performance of these materials was limited in scope and under conditions not always realistic to the commercial production of tablets. This work seeks to comprehensively characterize the compaction properties of 11 mannitol and 5 lactose grades using a compaction simulator at both slow and fast tableting speeds. These include tabletability, compressibility, tablet brittleness, die-wall stress transmission, and strain rate sensitivity. A chemometrical analysis of data, using the partial least square technique, was performed to construct a model to provide accurate prediction of tablet tensile strength for mannitol grades. Such knowledge facilitates the selection of suitable tablet filler to attain high quality tablet products.
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