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Critical Reviews™ in Therapeutic Drug Carrier Systems
IF: 2.414 5-Year IF: 3.324 SJR: 0.573 SNIP: 0.551 CiteScore™: 2.43

ISSN Print: 0743-4863
ISSN Online: 2162-660X

Critical Reviews™ in Therapeutic Drug Carrier Systems

DOI: 10.1615/CritRevTherDrugCarrierSyst.v16.i5.20
62 pages

Microemulsions: An Overview and Pharmaceutical Applications

Srini Tenjarla
Associate Director, Shire Pharmaceutical Development Inc, 1901, Research Boulevard, Suite 500, Rockville, MD 20850; and Serquest, a Southern Research Institute Company, 2000 Ninth Avenue South, Birmingham, AL 35205, USA

ABSTRACT

Microemulsions are potential drug carrier systems for oral, topical, and parenteral administration. They offer the advantage of spontaneous formation, ease of manufacturing and scale-up, thermodynamic stability, and improved drug solubilization and bioavailability. Preparing a pharmaceutically acceptable dosage form demands a clear understanding of the micro-emulsion structure, phase behavior, factors leading to its thermodynamic stability, factors influencing drug release from the formulation, requirements of ideal microemulsion excipients, and the potential uses and limitations of the microemulsion system. Knowledge of the various methods available to thoroughly characterize a microemulsion system is essential. An overview of these factors is presented in this review. While microemulsion is used in several fields, in this review the pharmaceutical applications are emphasized. Several references are cited, but the list is by no means exhaustive. The review is written so that a newcomer to the field can easily grasp the important facts pertaining to this novel delivery system.