申请人:Washiro Satoko
公开号:US20070134311A1
公开(公告)日:2007-06-14
An external preparation having excellent percutaneous absorption ability for ionic drugs is provided. An external preparation which comprises the following components (a) and (b); component (a): an ionic drug, component (b): an ionic liquid containing a cation and an anion. By this construction, the ionic liquid functions as a solubilizing agent for the ionic drug and thereby the solubility of the drug in the external preparation increases, so that percutaneous absorption ability of the ionic drug is accelerated.