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Preparation and Characterization of Nicotine-magnesium Aluminum Silicate Complex-loaded Sodium Alginate Matrix Tablets for Buccal Delivery

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Publisher Springer
Specialty Pharmacology
Date 2011 May 20
PMID 21594728
Citations 5
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Abstract

Nicotine (NCT) buccal tablets consisting of sodium alginate (SA) and nicotine-magnesium aluminum silicate (NCT-MAS) complexes acting as drug carriers were prepared using the direct compression method. The effects of the preparation pH levels of the NCT-MAS complexes and the complex/SA ratios on NCT release, permeation across mucosa, and mucoadhesive properties of the tablets were investigated. The NCT-MAS complex-loaded SA tablets had good physical properties and zero-order release kinetics of NCT, which indicate a swelling/erosion-controlled release mechanism. Measurement of unidirectional NCT release and permeation across porcine esophageal mucosa using a modified USP dissolution apparatus 2 showed that NCT delivery was controlled by the swollen gel matrix of the tablets. This matrix, which controlled drug diffusion, resulted from the molecular interactions of SA and MAS. Tablets containing the NCT-MAS complexes prepared at pH 9 showed remarkably higher NCT permeation rates than those containing the complexes prepared at acidic and neutral pH levels. Larger amounts of SA in the tablets decreased NCT release and permeation rates. Additionally, the presence of SA could enhance the mucoadhesive properties of the tablets. These findings suggest that SA plays the important role not only in controlling release and permeation of NCT but also for enhancing the mucoadhesive properties of the NCT-MAS complex-loaded SA tablets, and these tablets demonstrate a promising buccal delivery system for NCT.

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