Objective To explore the efficacy of using morphine sulfuric acid controlled-release tablets (MST) rectally in controlling the pain of advanced cancer.

• 目的观察硫酸吗啡控释片(MST)直肠给药对晚期癌症疼痛的镇痛疗效。方法采用MST直肠给药控制48例晚期癌症患者的中重度疼痛。