DESIGN, CHARACTERIZATION AND IN VITRO EVALUATION OF RIFAXIMIN EFFERVESCENT FLOATING TABLETS

In the present research work effervescent floating formulation of Rifaximin by using various polymers. Initially analytical method development was done for the drug molecule. Absorption maxima was determined based on that calibration curve was developed by using different concentrations. Gas generating agent sodium bicarbonate was used. Then the formulation was developed by using different concentrations of polymers of various polymers. The formulation blend was subjected to various preformualation studies, flow properties and all the formulations were found to be good indicating that the powder blend has good flow properties. Among all the formulations the formulations prepared by using Guar gum produced maximum drug release compared to other formulations hence it was considered as the optimized formulation. The optimized formulation dissolution data was subjected to release kinetics, from the release kinetics data it was evident that the formulation followed zero order kinetics of drug release. Keywords: Rifaximin, Sodium bicarbonate, Floatin