The main cause of DHEinitial abuse was for substitution of opiates. The amount of DHE abuse increased from9. 6 s 12. 1 tablets a day in initiation to 55 s 45 tablets a day.

• 初始滥用DHE的主要原因是以DHE代替其它毒品，由平均初始日滥用96片±s12.；1片增至55片±s45片。