Microemulsions (MEs) are thermodynamically stable,clear isotropic and less viscous liquid mixtures of oil and water containing domains of nanometer dimensions stabilized by the interfacial film of surface-active agent(s),i.e.,surfactant and co-surfactant.Interest in microemulsions has inten- sified because of their practical advantages as a drug delivery system,e.g.,ability to solubilize certain a- mount of solute in their interior which otherwise is not soluble in the solvent,better dispersion and easy abs...