PROBLEM TO BE SOLVED: To provide an agent for inhibiting the deterioration of liver function, caused by a platinum-containing agent.SOLUTION: This inhibitor for the deterioration of liver function, caused by the administration of the platinum-containing agent is characterized by including an alanylglutamine derivative.COPYRIGHT: (C)2012,JPO&INPIT【課題】白金含有薬剤により招来される肝機能低下を抑制する薬剤を提供する。【解決手段】アラニルグルタミン誘導体を含有することを特徴とする、白金含有薬剤投与による肝機能低下の抑制剤。【選択図】図1