Table 7. % Floating ability of microspheres at pH 1.2.

Formulation	Weight of microspheres taken initially(mg)	Weight of floating microspheres (mg)	% Floating ability
F1	50	30.6	61.2
F2	50	33.7	67.4
F3	50	35.3	70.6
F4	50	37.9	75.8
F5	50	39.8	79.6
F6	50	41.2	82.4
F7	50	42.5	85

Note: Data indicates the mean ± standard deviations are representative of at least three different experiments.