31 Patel M. R. Patel R. B. Parikh J. R. Bhatt K. K. Kundawala A. J 2007 Microemulsions: as novel drug delivery vehicle The design and development of new drug delivery systems with the intention of enhancing the efficacy of existing drugs is an ongoing process in pharmaceutical research. It is necessary for a pharmaceutical solution to contain a therapeutic dose of the drug in a volume convenient for administration.