<![CDATA[Nanotechnology is the science that deals with the processes that occurs at molecular level and of nanolength scale size.Reduction of drugs toxicity and enhancement of their bioavailability, biocompatibility, stability and appropriate release are of high opportunities to be accomplished by size reduction, which make pharmaceutical field highly interesting in nanotechnology. Formulation and preparation of highly advanced nano-materials as drug delivery systems achieve the desired therapeutic objective. Current review will discuss in brief types of pharmaceutical nano-sized drug delivery systems by focusing on the specificity and the nature of each type.]]>
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