Table 1.

DSM-IV criteria for drug addiction

Pattern of drug abuse causing significant harm or suffering, as characterized by three or more of the following:
1.	Tolerance
2.	Withdrawal symptoms
3.	Drug use in larger amounts or during longer periods than initially intended
4.	Difficulty in restricting drug use
5.	Great deal of time devoted to procuring and consuming drugs, and recovery from drug use
6.	Important social or professional activities given up in favor of drug-related activities
7.	Drug use continued despite knowledge of adverse consequences