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Applying the Taguchi Design for Optimized Formulation of Sustained Release Gliclazide Chitosan Beads: An in Vitro/In Vivo Study Publisher Pubmed



Varshosaz J1 ; Tavakoli N1 ; Minayian M1 ; Rahdari N1
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  1. 1. Isfahan Pharmaceutical Sciences Research Center, Department of Pharmaceutics, Isfahan University of Medical Sciences, Isfahan, P. O. Box 81745-359, Iran

Source: AAPS PharmSciTech Published:2009


Abstract

Gliclazide is a second generation of hypoglycemic sulfonylurea and acts selectively on pancreatic β cell to control diabetes mellitus. The objective of this study was to produce a controlled release system of gliclazide using chitosan beads. Chitosan beads were produced by dispersion technique using tripolyphosphate (TPP) as gelating agent. The effects of process variables including chitosan molecular weight, concentration of chitosan and TPP, pH of TPP, and cross-linking time after addition of chitosan were evaluated by Taguchi design on the rate of drug release, mean release time (MRT), release efficiency (RE8%), and particle size of the beads. The blood glucose lowering effect of the beads was studied in normal and streptozotocin-diabetic rats. The optimized formulation CL2 T5P2t10 with about 31% drug loading, 2.4 h MRT, and 69.16% RE8% decreased blood glucose level in normal rats for 24 h compared to pure powder of gliclazide that lasted for just 10 h. © American Association of Pharmaceutical Scientists 2009.
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