Abstract
This review generalizes scientific information on factors that determine the efficacy of transdermal drug delivery, including the barrier functions of skin, the properties of drugs and enhancers of skin permeability, and the type of a transdermal therapeutic system, i.e., plaster. Colloidochemical aspects of transdermal drug delivery are considered in relation to the amphiphilic structure of drugs and action mechanisms of enhancers, among which nonionic surfactants prevail. Advantages of microreservoir-type transdermal therapeutic systems are shown, information on which is very scarce; the prospects of their development on the basis of oil-in-water and water-in-oil emulsions containing nonionic surfactants and polymer adhesives are outlined.
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