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In the current study, a novel interpenetrating polymer network (IPN) hydrogel bead was developed by encapsulation of antidiabetic drug glipizide using sodium alginate (SAL) and xanthan gum (XAG) biopolymers by ionotropic gelation technique with calcium chloride as cross-linking agent. In light of the fact that IPN hydrogel beads possess greater benefits in controlling the release of such short acting drug, sodium alginate and xanthan gum IPN hydrogel beads were prepared at different mass ratios (SAL:XAG = 10:0, 9:1, 8:2, 7:3, 6:4, 5:5). Similarly, drug-loaded IPN hydrogel beads were also developed. The prepared hydrogel beads were investigated using Fourier transform infrared spectroscopy, X-ray powder diffraction, and thermogravimetric studies to understand the type of interactions between the composite beads. Surface morphology changes were studied by scanning electron microscopy. The particle size, drug entrapment efficiency, and swelling behavior of prepared hydrogel beads were also studied. Based on  in vitro  drug dissolution studies, it was observed that SXF4 preparation containing SAL and XAG polymers at 7:3 ratio showed extended drug release of 97.53% at 9 h. This study demonstrated that inclusion of XAG has extended the drug release and able to achieve zero-order drug release profile.

Design, development and characterization of interpenetrating polymer network hydrogel bead for controlled release of glipizide drug