PROBLEM TO BE SOLVED: To provide a liquid formulation for injection containing a pyrimidine based metabolism antagonist, in which coloration is prevented when stored at room temperature.SOLUTION: This liquid formulation for injection comprises a pyrimidine based metabolism antagonist and a tribasic organic acid or a salt thereof.SELECTED DRAWING: NoneCOPYRIGHT: (C)2017,JPO&INPIT【課題】室温での保存下で着色が防止されたピリミジン系代謝拮抗剤を含む注射用液剤等を提供すること。【解決手段】ピリミジン系代謝拮抗剤および3塩基有機酸またはその塩を含む、注射用液剤。【選択図】なし