Effects of isopropyl palmitate on the skin permeation of drugs.
The model penetrants oxaprozin, nimesulide, gliclazide, and ribavirin, because of their different lipophilicities, were selected to assess the enhancing activity of pre-treatment solutions consisting of isopropyl palmitate (IP) in ethanol (5%, 10%, 15%and 20%, w/w, respectively) across excised rat skin using Franz diffusion cells and HPLC detection. All pre-treatment solutions produced a significant increase in the flux and permeation of all four penetrants (p<0.001) and a relationship between penetrant lipophilicity and enhancement effect was observed. The general order of IP effectiveness at concentration was 20%>15%>10%>5% (w/w). The lag-time of drugs did not significantly change except for ribavirin.
Guo
Hong
H
Department of Pharmaceutics, Shenyang Pharmaceutical University, Shenyang, People's Republic of China.
Liu
Zhidong
Z
Li
Jizhong
J
Nie
Shufang
S
Pan
Weisan
W
D000005:Abdomen; D000279:Administration, Cutaneous; D000818:Animals; D002851:Chromatography, High Pressure Liquid; D004305:Dose-Response Relationship, Drug; D005227:Fatty Acids / Q000737:chemistry / Q000494:pharmacology; D005907:Gliclazide / Q000008:administration & dosage / Q000493:pharmacokinetics; D066298:In Vitro Techniques; D008055:Lipids / Q000737:chemistry; D008297:Male; D000077431:Oxaprozin; D010168:Palmitates / Q000737:chemistry / Q000494:pharmacology*; D010539:Permeability / Q000187:drug effects; D004364:Pharmaceutical Preparations / Q000008:administration & dosage / Q000378:metabolism*; D011422:Propionates / Q000008:administration & dosage / Q000493:pharmacokinetics; D051381:Rats; D017208:Rats, Wistar; D012254:Ribavirin / Q000008:administration & dosage / Q000493:pharmacokinetics; D012867:Skin / Q000187:drug effects* / Q000378:metabolism; D012869:Skin Absorption / Q000187:drug effects*; D012995:Solubility; D013449:Sulfonamides / Q000008:administration & dosage / Q000493:pharmacokinetics
D005227:Fatty Acids; D008055:Lipids; D010168:Palmitates; D004364:Pharmaceutical Preparations; D011422:Propionates; D013449:Sulfonamides; D012254:Ribavirin; C005060:isopropyl palmitate; D005907:Gliclazide; D000077431:Oxaprozin; C012655:nimesulide