Abstract
Since 2008 there has been an onslaught of new drugs in the illicit marketplace. Often referred to as "research chemicals," "designer drugs," or "novel psychoactive substances" (NPS), these substances are used for their pharmacological effects which are often similar to more widely known drugs such as ecstasy or heroin. In some cases users specifically seek out these new chemicals, in other cases they are simply purchasing what they believe to be their normal drug of choice from a dealer, but the product is not what it is purported to be. Implementation of national and international systems to monitor the appearance of new compounds enables laboratories to be prepared with validated tests to detect them in biological specimens. The most common classes of NPS are synthetic cannabinoids, novel opioids, novel benzodiazepines, stimulants, and hallucinogens. Within these groups the compounds may be drugs that were originally synthesized for research purposes during the pursuit of new therapeutic agents such as the synthetic cannabinoid JWH-018 and the designer opioid U47700. Others like etizolam are compounds used in other countries but not commonly seen in the USA. Some are drugs synthesized specifically to circumvent legal controls. In all cases, these compounds present a unique challenge to forensic toxicology laboratories which must quickly develop and validate analytical methods for the identification and quantification in biological matrices.This chapter is a condensed and updated version of an article originally published in Clinical and Forensic Toxicology News.
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