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Effect of medicinal stone content on drug release behavior of diclofenac sodium-loaded composite hydrogel beads
Author(s): YANG Hui-xia 1, 2, WANG Wen-bo 1, ZHANG Jun-ping 1, WANG Ai-qin 1
Pages: 1341-
1345
Year: 2011
Issue:
10
Journal: Chemical Research and Application
Keyword: 麦饭石; 凝胶小球; pH敏感性; 控制释放; 双氯芬酸钠;
Abstract: 以瓜尔胶-g-聚丙烯酸/麦饭石复合水凝胶(GG-g-PAA/MS)和海藻酸钠(SA)为原料,双氯芬酸钠(DS)为模拟药物,采用离子凝胶法制备了载药复合凝胶小球,考察了pH敏感性以及MS含量对复合凝胶小球的包封率、载药率、溶胀性和药物释放行为的影响。结果表明:凝胶小球具有明显的pH敏感性,在不同pH介质中溶胀率和释放速率不同,在模拟胃液中基本不释放药物,而转入模拟肠液2h后其药物累积释放率就超过了60%;另外,与不含MS的样品相比,随着MS的增加,包封率、载药率、溶胀率和药物累积释放率而减小,表明在载药凝胶小球中引入MS,可以减缓药物的突释效应。
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