96HYDROGEL AND NANOHYDROGEL– A REVIEWHydrogels are water-insoluble crosslinked hydrophilic networks capable of retaining a large amount of water. Characterization studies established that the hydrogel provides a controlled and uniform distribution of nanoparticles within the polymeric network without addition of any further stabilizer. Synthetic polymer hydrogels constitute a group of materials, used in numerous biomedical disciplines, and is still developing for new promising applications. The aim of this article is to present a concise review on the introduction and applications of hydrogels and nanohydrogel in drug delivery systemstjamespharmcyproject@gmail.comReview622016Nanoparticles,Nanohydrogel, Innumerous biomedical disciplinesDali Thampanchira,K. Krishnakumar,B. Dineshkumar,Anish JohnDepartment of Pharmaceutics, St James College of Pharmaceutical Sciences, Chalakudy, Thrissur, Kerala, India,Department of Pharmaceutics, St James College of Pharmaceutical Sciences, Chalakudy, Thrissur, Kerala, India,Department of Pharmaceutics, St James College of Pharmaceutical Sciences, Chalakudy, Thrissur, Kerala, India,St James Hospital Trust Pharmaceutical Research Centre (DSIR Recognized Centre), Chalakudy, Thrissur, Kerala, India