Objective: To investigate the effect of N G nitro L arginine (NO 2Arg) on psychical dependence induced by opiates on the basis of improved conditioned place preference model in mice.

• 目的：利用自行建立的条件性位置偏爱模型，探讨N－硝基－L－精氨酸（NO2Arg）对阿片类物质诱导的精神依赖性的影响。