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晚期恶性肿瘤患者常因伴有疼痛而导致肉体和精神上的极大痛苦。对癌痛的治疗，WHO制定了三阶梯止痛方案，硫酸吗啡占有极其重要的地位。美施康定是硫酸吗啡控释制剂，具有止痛作用时间长、血药浓度维持相对恒定等优点。我们观察了美施康定的疗效及副作用，对其有效性和耐受性作
Patients with advanced malignant tumors often experience physical and mental pain due to pain. For the treatment of cancer pain, WHO has developed a three-step analgesic plan. Morphine sulfate plays an extremely important role. Methiconidine is a controlled-release preparation of morphine sulfate, which has the advantages of long duration of analgesia and relatively constant plasma concentration. We observed the efficacy and side effects of metstained, and its effectiveness and tolerability