Development and Characterization of Sodium Alginate-Hydroxypropyl Methylcellulose-Polyester Multilayered Hydrogel Membranes for Drug Delivery through Skin

The multi-layered hydrogel membranes of sodium alginate-hydroxypropyl methylcellulose-polyester were developed for controlled delivery of anti-inflammatory drug, diclofenac diethylamine through intact skin. The XRD studies indicated the amorphous dispersion of drug in the membranes. DSC analysis suggested that as cross-linking increases, the stiffer membranes were formed. The prepared membranes were permeable to water vapors depending upon the cross-link density. The in vitro drug diffusion through excised rat abdominal skin depends on the cross-link density and polymer concentration. The primary skin irritation study indicated that the prepared membranes were less irritant and safe for drug delivery across the skin.