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Fabrication of Triple-Layer Matrix Tablets of Venlafaxine Hydrochloride Using Xanthan Gum

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Abstract

The objective of present investigation was to develop venlafaxine hydrochloride-layered tablets for obtaining sustained drug release. The tablets containing venlafaxine hydrochloride 150 mg were prepared by wet granulation technique using xanthan gum in the middle layer and barrier layers. The granules and tablets were characterized. The in vitro drug dissolution study was conducted in distilled water. The tablets containing two lower strengths were also developed using the same percentage composition of the middle layer. Kinetics of drug release was studied. The optimized batches were tested for water uptake study. Radar diagrams are provided to compare the performance of formulated tablets with the reference products, Effexor XR capsules. The granules ready for compression exhibited good flow and compressibility when xanthan gum was used in the intragranular and extragranular fractions. Monolayer tablets failed to give the release pattern similar to that of the reference product. The drug release was best explained by Weibull model. A unified Weibull equation was evolved to express drug release from the formulated tablets. Lactose facilitated drug release from barrier layers. Substantial water uptake and gelling of xanthan gum appears to be responsible for sustained drug release. The present study underlines the importance of formulation factors in achieving same drug release pattern from three strengths of venlafaxine hydrochloride tablets.

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Authors and Affiliations

  1. Department of Pharmaceutics and Pharmaceutical Technology, L. M. College of Pharmacy, P.O. Box 4011, Navarangapur, Ahmedabad, 380 009, Gujarat, India

    Mukesh C. Gohel & Shital H. Bariya

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  1. Mukesh C. Gohel
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  2. Shital H. Bariya
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Correspondence to Mukesh C. Gohel.

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Gohel, M.C., Bariya, S.H. Fabrication of Triple-Layer Matrix Tablets of Venlafaxine Hydrochloride Using Xanthan Gum. AAPS PharmSciTech 10, 624–630 (2009). https://doi.org/10.1208/s12249-009-9244-z

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  • DOI: https://doi.org/10.1208/s12249-009-9244-z

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