Abstract
Microemulsion (ME) is a system that has been discovered by Hoar and Schulman in the year 1943 and that thermodynamically stable and isotropic system of two immiscible liquids (oil / water), stabilized by an interfacial film of surfactants. The study of microemulsion systems is based on their three theories: (1) solubilization theory, (2) theory of interfacial tension and (3) thermodynamic theory. The structure ME is influenced by the physicochemical characteristics of the components used and quantity of the ingredients. The purpose of this review was to evaluate the microemulsified systems emphasizing a theoretical approach. Besides that, recent advances on clinical applicability and use as carrier of insoluble molecules are discussed.
