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