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Abstract
Non-ionic surfactant vesicles, simply known as niosomes are synthetic vesicles with potential technological applications. Niosomes have the same potential advantages of phospholipid vesicles (liposomes) of being able to accommodate both water soluble and lipid soluble drug molecules control their release and as such serve as versatile drug delivery devices of numerous applications. Additionally, niosomes can be considered as more economically, chemically, and occasionally physically stable alternatives to liposomes. Niosomes can be fabricated using simple methods of preparations and from widely used surfactants in pharmaceutical technology. Many reports have discussed niosomes in terms of physicochemical properties and their applications as drug delivery systems. In this report, a brief and simplified summary of different theories of self-assembly will be given. Furthermore manufacturing methods, physical characterization techniques, bilayer membrane additives, unconventional niosomes (discomes, proniosomes, elastic and polyhedral niosomes), their recent applications as drug delivery systems, limitations and directions for future research will be discussed.