DEVELOPMENT AND CHARACTERIZATION OF CONTROLLED RELEASE FAMOTIDINE MATRIX TABLETS CONTAINING COMPLEXES
Objective: The aim of the present study was to formulate the controlled release (CR) tablets of famotidine-cyclodextrin complexes to make the feasibility of complex in CR tablets and to access the kinetic of drug release mechanism
Methods: In this work the solubility study of famotidine was performed in various solvents like 0.1 N HCl, phosphate buffer pH 7.4 and distilled water. Enhancement of the solubility and dissolution rate of famotidine was done by complexation with cyclodextrin before formulation into controlled release tablets. Tablets were prepared in different batches by using different concentration of HPMC K15M (hydroxy propyl methyl cellulose) and EC (ethyl cellulose) polymers and polymer blend. All batches were evaluated for pre-compression and post-compression parameters. Release kinetics was analyzed using zero order, first order, higuchi, peppas and hixon-crowell model.
Results: All the formulation showed compliance with Pharmacopoeial standards. Release studies indicated that polymer blend (62%HPMCK15M and 38%EC) based matrix tablets with complexed drug was able to control the release of famotidine up to 12 h. Optimized formulation F13 containing complexed drug with same polymer blend showed zero order release and the release mechanism was predominant matrix swelling with erosion.
Conclusion: Results of the present study demonstrated that the drug: Î²-cyclodextrin complex would be a suitable candidate for preparing controlled release tablets of famotidine to improve drug solubility, flow properties and compressibility. Thus the complex used in matrix tablet is a promising approach to achieve appropriate controlled release dosage.
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