Nirmal Morya, Komal Verma
Oral route is most convenient route of drug administration. Objective of this study was to develop a gas generating drug delivery system of MH with the help of different viscosity grades of hydroxyl propyl methyl cellulose to obtain continuous release and provide buoyancy in the stomach. HPMC K15, HPMC K100M, HPMC K100LVCR were use as release controlling polymer. Citric acid, Sodium bicarbonate was use gas forming compounds. Design of experiment (DoE) is applied by using JMP software and formulate 17 batches obtain through DoE. In vitro characterization was performed for all the formulation. Precompression parameters were found to be 0.41±0.121 gm/cc bulk density, 0.608±0.179 gm/cc tapped density and good flow properties. Post compression parameters were 15.0±0.009 kp hardness, 7.23±0.005 mm thickness, and 95.29±0.021% drug content. Swelling index was 135.64±3.2% at 6 hrs. In vitro drug release was 95.95±1.89% at 24 Hrs. F1 value was 7.63 and F2 value was 56.33. Formulation was stable in given stability condition. Formulation obtained after optimization was compared with marketed formulation so we can say that gas generating formulation of MH was having good characteristics over the marketed formulation.