To provide a transdermal absorption promoting agent capable of performing the promoting effect of the transdermal absorption for a medicinally effective ingredient without blending a transdermal absorption promoting assis tant as conventionally done, and being used without setting specific limitations in its preserving condition, handling or the like. 従来のように経皮吸収促進助剤を配合しなくとも、薬効成分の経皮吸収促進効果を奏することができ、また保存条件や取り扱い等においても特に制限を設けることなく用いることができる経皮吸収促進剤を提供する。 - 特許庁