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Development and Characterization of Buccoadhesive Nifedipine Tablets Publisher Pubmed



Varshosaz J1 ; Dehghan Z2
Authors
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Authors Affiliations
  1. 1. Department of Pharmaceutics, School of Pharmacy and Phamaceutical Sciences, Isfahan University of Medical Sciences, Isfahan, Iran
  2. 2. Department of Pharmaceutics, School of Pharmacy and Phamaceutical Sciences, Isfahan University of Medical Sciences, Isfahan, P.O. Box 81745-359, Iran

Source: European Journal of Pharmaceutics and Biopharmaceutics Published:2002


Abstract

The buccoadhesive controlled-release tablets for delivery of nifedipine were prepared by direct compression of carboxymethyl cellulose (CMC) with carbomer (CP), which showed superior bioadhesion properties compared to polyvinylpyrrolidone (PVP), polyvinyl alcohol (PVA), hydroxypropylmethyl cellulose (HPMC), and acacia in a modified tensiometry method in vitro. The tablets containing 30mg of nifedipine and various amounts of CMC and CP showed a zero-order drug release kinetic. The adhesion force was significantly affected by the mixing ratio of CP:CMC in the tablets. The weakest and highest adhesion force was observed at the mixing ratios of 1:0 and 8:2 of CP:CMC, respectively. The tablets containing 15% CMC and 35% CP adhered for over 8h to the upper gums of six healthy human volunteers. These tablets released about 56% of the loaded drug after 8h in vivo with a rate of 2.17h-1 and were perfectly tolerated, while they released about 100% of their content after the same time with a rate of 3.49h-1 in vitro. A good correlation (r2=0.989) was observed between drug-released in vitro and in vivo. Copyright © 2002 Elsevier Science B.V.
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