Controlled release drug delivery is now the standard in modern pharmaceutical design. Intensive research has been\r\nundertaken in achieving better effectiveness, reliability and safety. Lipids have a high potential for development of controlled\r\nrelease systems. There is an increasing interest in lipid based drug delivery systems due to factors such as better\r\ncharacterization of lipidic excipients and formulation versatility and the choice of different drug delivery systems. The use of\r\nlipid matrices appears to have several advantages such as being a multiple-unit system, chemical inertness against other\r\nmaterials and ease of manufacturing with high reproducibility that can be obtained without special instrumentation, as well as\r\nlow production cost. There seems to be a shortage in detailed information on lipid matrices. This review aims to present data\r\navailable hitherto. Details on available lipid surfactants have also been given. Recent advancements in this field including lipid\r\nmicroparticles and nanoparticles, archaesomes etc have also been discussed.
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