Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
2487412 | Journal of Pharmaceutical Sciences | 2008 | 13 Pages |
Abstract
Magnesium stearate is a functional excipient used to ensure efficient ejection of tablets. This study compares the functionality of a vegetable and bovine grade of magnesium stearate. Tablets were prepared by direct compression and dry granulation of a model formulation. Physical and chemical tests were performed on bulk powders, granule intermediates, and finished tablets to provide a comprehensive comparison of the two grades of magnesium stearates. Raw material characterization of the two grades showed no difference in particle size, surface area, true density, and total moisture content. However, significant differences in fatty acid composition, surface tension, and zeta potential were detected. Tablet ejection force for the physical mixture formulations was variable, showing similar ejection force for the two grades of magnesium stearate at some concentrations and different ejection forces at other concentrations. The dry granulated formulation containing vegetableâbased magnesium stearate showed a lower ejection force than the formulation containing bovineâbased magnesium stearate. There was no difference between the dissolution profiles of the tablets containing the two grades of magnesium stearate prepared by both methods. The results indicated that magnesium stearate interchangeability with respect to lubricant efficiency depends upon the level in which it is used and the manufacturing method. © 2008 WileyâLiss, Inc. and the American Pharmacists Association J Pharm Sci 97:5328-5340, 2008
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Authors
Mazen L. Hamad, Abhay Gupta, Rakhi B. Shah, Robbe C. Lyon, Vilayat A. Sayeed, Mansoor A. Khan,