Review of Hydrogel

Hydrogel is one of the semi-solid topical dosage forms, which includes cross-linked three-dimensional networks of hydrophilic polymer chains; therefore, it can entrap a larger amount of water.Hydro-gels have the advantages of increased biocompatibility, porous structure, tunable biodegradability, and proper mechanical strength as compare to other type of topical drugs.Several studies are indicated that the usefulness of gels especially hydrogels in modern drug therapy.They are efficient drug delivery systems in several routes including topical, Parenteral, oral, vaginal, ophthalmic etc. Hydrogel systems are able to deliver not only aqueous soluble drugs but also poorly soluble drugs.Hydrogels offer a highly biocompatible, effective and patient friendly solution for controlled drug delivery.