Chitosan polymer used as carrier in various pharmaceutical formulations: Brief review.

Chitosan (CS) is a naturally occurring polymer which finds a wide array of pharmaceutical applications due to its low production costs, biodegradability, biocompatibility, nontoxic nature and mucoadhesion. It has been used in the blueprint of many different types of drug carriers; for various administration rules such as oral, buccal, nasal, transdermal, parenteral, vaginal, cervical, intrauterine and rectal. CS microspheres can be prepared by chemical denaturation process, solvent evaporation method and complex coacervation methods.