Abstract
Fatty alcohols, fatty acids (saturated and unsaturated), and fatty acid esters have been extensively utilized as skin penetration enhancers in many research studies over the past 3 decades. Some of these compounds, for example, oleic acid, stearic acid, isopropyl palmitate, ethyl oleate, have been approved by the US Food and Drug Administration for their use in topical and transdermal products. It is generally believed that these agents increase skin permeation by disrupting the lipid organization in skin layers, forming solvated complexes, increasing the diffusivity and partitioning of drugs in/through the skin barrier. This chapter summarizes the utility of fatty alcohols, fatty acids, and their esters as promising percutaneous penetration enhancers for topical and transdermal delivery of drugs. The role of vehicle or other ingredients from the formulation on the enhancement effects of the topical or transdermal formulation and their skin irritation potential has also been presented.
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Babu, R.J., Chen, L., Kanikkannan, N. (2015). Fatty Alcohols, Fatty Acids, and Fatty Acid Esters as Penetration Enhancers. In: Dragicevic, N., Maibach, H. (eds) Percutaneous Penetration Enhancers Chemical Methods in Penetration Enhancement. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-662-47039-8_9
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