Parenteral delivery of hydrophobic drugs is a challenging task. Research on exploiting newer approaches to make the delivery of pharmaceuticals by nondigestive tracts effective yet safe and cost effective shows that microemulsion is one such approach for parenteral delivery. This new book provides systematic information regarding the preformulation of drugs, formulation using quality by design (QbD) principles, and characterization of parenteral microemulsions for drug delivery. The book explores specific aspects of microemulsions such as the role of surfactants and cosurfactants in formulation, clinical aspects of parenteral microemulsion, regulatory perspectives and patents, as well as future challenges in this field of research.