Method: 1128 prescriptions of narcotic analgesics collected from three general hospitals of Qingdao in March 1998 were analyzed. DDD and DUI for narcotic analgesic drugs were calculated as an indicator of rational drug use.

• 方法··：统计分析该市3家综合医院1998年3月的住院处方，以限定日剂量（DDD）和药物利用指数（DUI）为指标分析其使用情况。