The resultsfrom monkeys showed that the withdrawal syndromes can be precipitatedby naloxone after 25 or 50 times of CDD of morphine to be given subcu-taneously for 60 days, and the nature withdrawal syndromes can be foundafter administrating for 90 days.

• 对八只猴的实验结果表明:无论催促戒断或自然戒断实验,25倍CDD以上剂量组均表现程度不等的戒断症状。