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AAPS PharmSciTech. 2004 September; 5(3): 51–56.
Published online 2004 July 12. doi:  10.1208/pt050343
PMCID: PMC2750266

Preparation and evaluation of diltiazem hydrochloride-gelucire 43/01 floating granules prepared by melt granulation

Abstract

The basic objective of this study was to explore the application of Gelucire 43/01 for the design of multi-unit floating systems of a highly water-soluble drug diltiazem HCl. Diltiazem HCl-Gelucire 43/01 granules were prepared by melt granulation technique. The granules were evaluated for in vitro and in vivo floating ability, surface topography, and in vitro drug release. Aging effect on storage was vvaluated using scanning electron microscopy, hot stage polarizing microscopy (HSPM), differential scanning calorimetry (DSC), and in vitro drug release. Granules were retained in stomach at least for 6 hours. Approximately 65% to 80% drug was released over 6 hours with initial fast release from the surface. Surface topography, HSPM, DSC study of the aged samples showed phase transformation of Gelucire. The phase transformation also caused significant increase in drug release. In conclusion, hydrophobic lipid, Gelucire 43/01, can be considered as an effective carrier for design of a multi-unit floating drug delivery system of highly water-soluble drugs such as diltiazem HCl.

Keywords: multi-unit lipid granules, floating, diltiazem hydrochloride, Gelucire, aging

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.
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