Abstract
Microsponges are the spherical particles ranging from 5 to 300 μm in size. These are further made up of clusters of smaller spheres. They are designed for delivering the drug efficiently at a comparatively lesser dose and enhancing the stability, modifying the drug release profile and minimizing the side effects. Microsponge drug delivery system decrease transdermal invasion of the active ingredient into the skin while increasing the time the drug remains on the skin surface or within the epidermis. Preparation of the microsponges includes two techniques: Liquid-liquid suspension polymerization and Quasi-emulsion solvent diffusion method. Their characterization and evaluation can be done in many ways like particle-size measurement and porosity, morphology, true density determination, analyzing the rheological properties, and dissolution studies. Present work focuses on the detailed study of the microsponge drug delivery system. This will help the reader to get all the information regarding the microsponge delivery systems.
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