Problem to be solved: to provide a therapeutic agent for external use of nail nail, drug efficacy and pharmaceutical properties (especially, external nail nail agent), which is excellent in nail permeability, medicinal efficacy and pharmaceutical properties, especially in non coat type therapeutic agent for external nail containing medium chain fatty acid triglyceride as a non-volatile ingredient .Solution: an antifungal active substance, (b) volatile component, (c) medium chain fatty acid triglyceride, (d) lactic acid ethyl, and E) an external preparation containing sodium dedetate hydrate.No selection【課題】中鎖脂肪酸トリグリセリドなどを不揮発性成分として含む非被膜系の外用爪疾患治療剤（特に、外用爪白癬治療剤）において、爪透過性、薬効、及び、製剤物性の面で優良であり、臨床適用可能な外用爪疾患治療剤（特に、外用爪白癬治療剤）の提供。【解決手段】爪白癬の治療剤であって、ａ）抗真菌活性物質と、ｂ）揮発性成分と、ｃ）中鎖脂肪酸トリグリセリドと、ｄ）乳酸エチルと、ｅ）エデト酸ナトリウム水和物を含有する外用剤。【選択図】なし
