三阶梯疗法是指根据轻、中、重不同程度的疼痛，单独和（或）联合应用以阿司匹林为代表的非类固醇抗炎药，以可待因为代表的弱阿片类药，以吗啡为代表的强阿片类药，配合其他必要的辅助药来处理癌性疼痛。第一阶梯：非阿片类加辅助药；第二阶梯：弱阿片类加非阿片类加辅助药； Three-step therapy refers to the non-steroidal anti-inflammatory drugs represented by aspirin alone and / or in combination with mild to moderate pain, the weak opioid represented by codeine, morphine Strong opioids, with other necessary adjuvant to deal with cancer pain. First step: non-opioid plus adjuvant; second step: weak opioid plus non-opioid plus adjuvant;