For the drug-testing industry, this is a time of new technologies and changes. There are various forms of lateral-flow devices making drug testing easier and providing results in matters of minutes. Test matrices other than urine are being investigated in which windows of detection can be narrowed to a few hours for detection of driving under the influence or be extended to several months to provide a long-term history of drug use. Moreover, information on drug testing is now widely available on the Internet, so that many more nonscientists are educated about drug testing. In this final chapter, we attempt to provide our personal thoughts on the industrial and scientific trends.

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