Stereoselective Permeation of Tretinoin and Isotretinoin through Enhancer-Treated Rat Skin. II. Effects of Lipophilic Penetration Enhnacers

Abstract

Many properties of chemicals depend on their stereochemistry. Among these, the effects of stereoisomerism on percutaneous absorption of drugs are not well studied. We have previously shown that permeation of tretinoin and isotretinoin (two geometric isomers) through hydrophilic enhancers-treated rat skin is stereoselective. As, depending on their lipophilicity, penetration enhancers can change permeation pathway of drugs, it was decided here to investigate permeation of the same stereoisomers through lipophilic enhancer-treated skin.