OBJECTIVE:To observe the effects of borneol affecting the transdermal amount of drugs.METHODS:Drugs permeation tests were performed in a two-compartment diffusion cell through cobra skin in vitro,in rabbits and on the human skin blanching assay in vivo,respetively.RESULTS:In vitro,borneol increased the percutaneous transport of metronidazole and 5-fluorouracil.The potency of 3.0% borneol was different from that of 1.0%borneol.On the human skin beanching assay in vivo it indicated that borneol enhanced the bioavailability of percutaneous penetration of triamcinolone acetonide acetate.In rabbits,borneol increased AUCo～12h of salicylic acid in plasma.CONCLUSION:It indicated borneol is a effective percutaneous penetration enhancer.