Abstract
Plasters containing methyl salicylate with and without l-menthol and dl-camphor were prepared and topically applied on hairless mouse skin to investigated the effects of l-menthol and dlcamphor on the skin penetration and hydrolysis of methyl salicylate in the skin. The in vitro hydrolysis of methyl salicylate was also investigated using the skin homogenate. It was found that l-menthol with dl-camphor enhanced the skin penetration of methyl salicylate, and they inhibited both the in vivo and in vitro hydrolysis of methyl salicylate to salicylic acid.
