Provided is a medicine effective for prophylactic or treating peripheral nerve disorder as an adverse side effect occurring after the administration of an anti-cancer agent.The present invention provides a medicine containing an ester of a fatty acid having 10 carbon atoms as an active ingredient, for prophylactic or treating the peripheral nerve disorder induced by the administration of a medicine containing at least one anti-cancer agent.The medicine of this invention containing the said compound as an active ingredient is highly useful as a medicine for prophylactic or treating the peripheral nerve disorder induced by the administration of an anti-cancer agent.本發明的目的在於提供一種藥劑,該藥劑係對因抗癌劑的投藥而成為副作用顯現的末梢神經障礙的預防或治療有效。本發明提供一種含有碳數10的脂肪酸酯為有效成分的藥劑,係用於預防或治療至少含有1種抗癌劑的藥劑的投藥而產生的末梢神經障礙。以該化合物為有效成分的本發明藥劑,係做為預防或治療由於抗癌劑的投藥而引起的末梢神經障礙的藥劑,而有用性高者。由於本案的圖為試驗數據,並非本案的代表圖。故本案無指定代表圖。