Development and Evaluation of a Floating Multiparticulate Gastroretentive System for Modified Release of AZT

被引：0
作者：
Valquíria Miwa Hanai Yoshida
José Martins de Oliveira Junior
Marcos Moisés Gonçalves
Marta Maria Duarte Carvalho Vila
Marco Vinícius Chaud
机构：
[1] Sorocaba University,Pharmaceutical Sciences Post
[2] Sorocaba University,graduate Program
来源：
AAPS PharmSciTech | 2011年 / 12卷
关键词：
AZT; extended release; gastroretentive floating system; microballoons; modified release; zidovudine;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
The aim of this study was to develop and evaluate a floating multiparticulate gastroretentive system for the modified release of zidovudine (AZT). AZT was used as a model drug water-soluble at therapeutic doses. The floating gastroretentive system was obtained by co-precipitation, after solvent diffusion and evaporation. The proposed system was evaluated in vitro for particle morphology, lag time and floating time, loading rate, release profile, and the release kinetic of AZT release. AZT’s physico-chemical characteristics were evaluated by differential scanning calorimetry (DSC), X-ray diffraction (XDR) and infrared spectroscopy (IR). The particles obtained were sphere-shaped, hollow, and had porous walls. The floating was immediate, and floating time was higher than 12 h. The loading rate was 34.0 ± 9.0%. The system obtained had an extended release. DSC and XDR results showed a modification in AZT’s solid state. IR spectroscopy revealed that the chemical structure of the AZT was unchanged. The hollow microballoons presented gastroretentive, floating, and extended-release properties.
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页码：658 / 664
页数：6
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