Effectiveness of Interdiction Spending

"In 2005, the federal government spent $2.6 billion to disrupt and deter the transport of illicit drugs into the United States. While international efforts to step up drug seizures may affect availability, price and consequences associated with a particular drug (i.e., cocaine or heroin), CASA was unable to find evidence that such strategies have an overall impact on reducing substance abuse and addiction or its costs to government."