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The aim of performing this study is to develop matrix tablet to improve the dissolution rate of aceclofenac and release the drug in a controlled manner over a period of 24 hours. Matrix tablets of aceclofenac, using various viscosity of hydrophilic polymer HPMC in two different proportions, hydrophobic polymer ethyl cellulose and Guar gum were prepared by wet granulation method and subjected to in vitro drug release studies. Tablets were evaluated for in vitro drug release profile in phosphate buffer with pH 7.5. The thickness and hardness of prepared tablets were 3.8 ± 0.2 to 3.9 ±0.2 mm and 4 ± 3 to 5 ± 3 kg/cm2, respectively. The friability was within the acceptable limits of pharmacopeial specifications (0.31 to 0.71%), which indicates the good mechanical strength of the tablets. The in vitro drug release from the proposed system was best explained by Higuchi’s model, indicating that drug release from tablets displayed a diffusion-controlled mechanism. Based on the study results, formulation F7 was selected as the best formulation.
Singh et al. (Wed,) studied this question.