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Illicit and Illegal Drugs

Substance abuse is among the major public health concerns of the 20th century. However defined, excessive use of illegal drugs and prescribed medications is an all-too-common societal problem, not only in the United States, but across the globe. The negative effects of excessive substance use influence not only the individuals who use these substances but also their immediate and extended families and society in general. Moreover, illicit substance use is connected to many of the most pressing of our societal ills, including illness, crime, violence, and homelessness.

Scope of the Problem

For illicit psychoactive substances, the lifetime prevalence of drug abuse or dependence is roughly 6% in the United States, with lifetime cannabis abuse (i.e., 4.6%) being the most common. The World Health Organization estimates that 28 ...

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