solid particles.

From the last few decades, there has been a considerable research interest in the area of drug delivery using particulate delivery systems as the carriers for smaller and larger molecules. The particulate systems like nanoparticles have been used as a physical approach to alter and improve the properties of various types of drug molecules like pharmacokinetic and pharmacodynamic. The nanoparticles are defined as particulate dispersions or solid particles with the size in the range between 10-1000nm. The drugs are dissolved, entrapped, encapsulated or attached to the nanoparticle matrix. Nanoparticles, nanospheres or nanocapsules can be obtained which depends upon the method of preparation, This review article covers the different methods of preparation of Nanoparticles, different types of Nanoparticles, their evaluation and applications of Nanoparticles