Abstract: Use of nanotechnology in medicine and more specifically in delivering the drug at the particular site is set tobe spreading rapidly. At the molecular and sub molecular level the nanotechnology has scrutinize its electrical, optical and magnetic activity as well as their structural behavior. The pharmaceutical sciences are using nanoparticles now a daysto reduce toxicity and side effects which s caused the carrier systems. At present a large number of substances are under research for

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... rug delivery and more precisely for cancer chemotherapy. The nanoparticles caneasily crosses the various biological barriers within the body due to their small size. The potential toxicity of inhaled particles may also influenced by the absorbed species. It is clear that the potential toxicity and potential interactions with tissues or cells, greatly depends on the actual composition of the nanoparticle formulation.Nanotechnology has its capability to revolutionize a series of biotechnology and medical tools and procedures so that they are safier and administered easily. This article gives an general view of some of the currently used drug delivery systems.