Modified release biological macromolecules (beads) of gliclazide using sodium alginate combined with
either gellan gum or pectin in different ratios were prepared by Ionotropic gelation method. Biological
macromolecules were evaluated for different physico-chemical parameters. Increase in polymers
proportion showed difficulty in production of biological macromolecules due to high viscosity of dispersion.
As the polymer concentration increases, the swelling and entrapment efficiency of drug increased.
Compared to all other batches and commercial modified release gliclazide tablet, formulated biological
macromolecules of sodium alginate with pectin (2:1 ratio) and with gellan gum (6:0.75 ratio) exhibited
spherical shape, biphasic in vitro release profile and initial high drug release followed by moderate release
up to 12 h as matrix diffusion kinetics and Higuchi model as well as Korsmeyer model.