The aim of the present investigation was to prepare & evaluate bilayer floating tablet
of Baclofen. In which one layer was made up of immediate release layer to provide
loading dose, while another layer was made up of floating layer of BCF to provide
maintenance dose. The focus of present work was to prepare and evaluate bilayer
floating tablet of Baclofen to increase residence time in stomach and there by gives
prolog action. Tablets were prepared by wet granulation technique. Drug-excipients
compatibility study was done by using Fourier transform infrared spectroscopy
(FTIR). Optimization was carried out using artificial neural network (ANN) and
multiple regression analysis using 32
factorial designs. Cumulative percentage release
(CPR) at 24 hr, time required for 50% of drug release (T50%), floating lag time study
of the tablet formulations were selected as dependent variables. The Content of
HPMC K 4M (X1) and Content of PEO WSR N 10 (X2) were selected as independent
variables. Tablets were evaluated for swelling index, in vitro buoyancy and in vitro
drug release. The similarity factor (f2) was used as a base to compare dissolution
profiles. Optimized batch was subjected for kinetic modeling. Different process
parameters of optimized batch were also studied. From FTIR spectra it was observed
that there were no any interaction between drug and excipients used. The results
demonstrate that 3.5% of crosspovidone released 99% of drug in 20 minutes. It was
found that HPMC K 4M with concentration 30% and PEO WSR N 10 with
concentration 20% showed good sustained as well floating ability and its releases
99.39% of drug within 24 hrs. Drug release was best explained by Higuchi plot. It was
seen that the process parameters have great influence on performance of bilayer
floating tablet. To check the accuracy of these predictions, experimentally three
formulations were prepared by random selection of causal factors as per counter plot
and also validated ANN. The experimental data were compared with predicted data by
paired t test, no statistically significant difference was observed. ANN showed less
error compared with multiple regression analysis. These findings demonstrate that
ANN provides more accurate prediction and was quite useful in the optimization of
pharmaceutical formulations than the multiple regression analysis method.