The drug-containing fat emulsion of the present invention is a drug-containing fat emulsion containing at least water-insoluble drug, fats and oils, emulsifiers and water as constituents, the fat and oil content being 2 to 120 mg / mL (excluding 2 mg / mL), The weight ratio of drug to fat (drug / fat) is 0.001-20 (however, the total content of drug and fat is 125 mg / mL at the maximum), and the content of lecithin as an emulsifier is 50-200 mg / mL (50 of lecithin used) The weight% or less may be replaced with an emulsifier other than lecithin), and the turbidity is 0.5 or less.本発明の薬物含有脂肪乳剤は、水難溶性薬物、油脂、乳化剤、水を少なくとも構成成分とする薬物含有脂肪乳剤であって、油脂の含量が２～１２０ｍｇ／ｍＬ（但し２ｍｇ／ｍＬを除く）、油脂に対する薬物の重量比率（薬物／油脂）が０．００１～２０（但し薬物と油脂の合計含量は最大で１２５ｍｇ／ｍＬ）、乳化剤としてのレシチンの含量が５０～２００ｍｇ／ｍＬ（用いるレシチンの５０重量％以下をレシチン以外の乳化剤に置き換えてもよい）であり、濁度が０．５以下であることを特徴とする。
