PROBLEM TO BE SOLVED: To provide methods for alleviating severe side effects caused by an anticancer agent or the like, for reducing duration of hospitalization, and for reducing costs of medical treatment such as a hospital charge and a drug cost.SOLUTION: Provided is a method for administering a substance inhibiting the activity of the promoter involved in transcription from DNA to m-RNA into tumor tissues, such as cancer, being performed by puncturing the tumor tissues such as cancer with an injection needle and directly administering the substance inhibiting the activity of the promoter, or being performed using drug delivery systems, or being performed by administering a drip transfusion in circulatory administration manner.SELECTED DRAWING: NoneCOPYRIGHT: (C)2018,JPO&INPIT【課題】抗癌剤等のひどい副作用を軽くする為と病院の入院期間や入院費、薬剤代等の治療費を少なくする方法の提供。【解決手段】DNAからm-RNAへの転写に関与するプロモーターの活動を阻害する物質を、癌等の腫瘍組織に投与する方法であり、直接に、癌等の腫瘍組織に注射針を刺してプロモーターの活動を阻害する物質を投与するか、またはドラッグ・デリバリーに依る方法、若しくは点滴輸液に依って循環器的に投与する方法。【選択図】なし