In PR schedule, the stable breakpoint of DHE was 2022, but that of heroine was only 911. Result has been proved, DHE has showed high psychological dependence potential and strong reinforcing effects.

• 在累进比率实验中 ,断点达到2022 ,而海洛因只有911。 结果证明 ,盐酸二氢埃托啡具有很强的精神依赖性潜力 ,其精神依赖性潜力比海洛因强得多 ,且具有成瘾潜伏期较短 ,相邻两次注射间隔短等特点。