FORMULATION OPTIMIZATION AND EVALUATION OF GASTRORETENTIVE TABLETS OF ONDANSETRON HCL
The aim of the work is to design Gastroretentive tablets of Ondansetron HCl for gastric retention by using 32 factorial designs. Floating tablets of Ondansetron HCl were prepared by direct compression method using polymers, sodium alginate and excipient. Gastroretentive tablets of Ondansetron HCl were successfully prepared by effervescent technique using different gel forming polymers- HPMC K200M, and sodium alginate. Formulation was optimized by design expert software. Floating tablets were evaluated for floating time, floating lag time, drug content, raft measurement and in vitro dissolution profile. The lag time is between 17-22 sec and floating time of the formulations for 12 hrs. The best fit model is Korsemeyer Peppas Model. From the study it is proof that the sustain release by floating tablets of Ondansetron HCl can be develop. Optimized batch selected was A3, The prepared gastroretentive test formulation was found to exhibit satisfactory physico-chemical characteristics at the end of 3 months, during the stability studies. The optimized formulation A3 was found to be stable at 400C/ 75% RH.
Keywords: Gastric retention time, Ondansetron HCl, HPMC, sodium alginate, measurement of raft, Factorial design, stability studies.
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