Journal
INTERNATIONAL JOURNAL OF PHARMACEUTICS
Volume 348, Issue 1-2, Pages 27-34Publisher
ELSEVIER
DOI: 10.1016/j.ijpharm.2007.07.009
Keywords
gastro-retentive system; controlled release alfuzosin; zero-order drug delivery; composite matrix; texture analysis
Categories
Ask authors/readers for more resources
A composite gastro-retentive matrix for zero-order delivery of highly soluble drug alfuzosin hydrochloride (10mg) has been designed and characterized. Two systems containing polyethylene oxide (PEO), hydroxypropylmethylcellulose (HPMC), sodium bicarbonate, citric acid and polyvinyl pyrrolidone were dry blended and compressed into triple layer and bi-layer composite matrices. Dissolution studies using the USP 27 paddle method at 100 and 50 rpm in pH 2.0 and 6.8 were performed using UV spectroscopy at 244 nm, with automatic sampling over a 24 h period using a marketed product as a reference to calculate the 'f2 factor. Textural characteristics of each layer, the composite matrix as a whole, and floatation potential were determined under conditions similar to dissolution. Percent matrix swelling and erosion along with digital images were also obtained. Both systems proved to be effective in providing prolonged floatation, zero-order release, and complete disentanglement and erosion based on the analysis of data with 'f2 of 68 and 71 for PEO and HPMC based systems, respectively. The kinetics of drug release, swelling and erosion, and dynamics of textural changes during dissolution for the designed composite systems offer a novel approach for developing gastro-retentive drug delivery system that has potential to enhance bioavailability and site-specific delivery to the proximal small intestine. (c) 2007 Elsevier B.V. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available