FORMULATION AND DEVELOPMENT OF BILAYER FLOATING TABLET OF AMOXICILLIN

Bilayer floating tablet of amoxicillin was formulated successfully and evaluated under suitable parameters. All the batches of tablet produced were found to exhibit short floating lag times. The tablet of batch F2 exhibited a longer floating lag time of 23 minutes. Relationship between the dependent and independent variables was further elucidated using contour and response surface plots. Dissolution profiles that the tablets of batch F3, F7, and F12 exhibits initial burst phase during the first hour of dissolution. The burst phase was followed by a limited drug release for the rest of the period. Also it was observed during the dissolution studies that tablets of all three batches eroded quickly with increased effervescence. Time required for 50 % drug to get released (T50%) and %CR10hrs were found to be in the range of 0.7 to 8.6 hours and 57.35 ± 3.89 to 99.93 ± 0.07 respectively, value of “Prob > F” less than 0. 05. Response surface plots and Contour plot indicated that at a fixed level of B (35 mg) and low level of A (amount of HPMC), % CR10hrs increases from 68.11 to 90.00 % and T50% decrease from 6.86 to 1.66 as the amount of citric acid (C) increases from 0 to 10 mg. Stability study was performed for optimized formulation and it was found that formulation was stable for 6 week at 25 °C/ 60% RH. KEYWORDS: Bilayer floating tablet, amoxicillin, Evaluated, Multi-layered tablet, Stability