Novel designer drugs, also called research chemicals or legal highs, still produce physiological and psychological effects, though experts say that they can come with a slew of risks. Synthetic opioids such as fentanyl, for instance, are increasingly cited among the number of opioid-related deaths in the United States, which reached more than 75,000 this year. According to the Centers for Disease Control and Prevention, synthetic cannabinoids can cause heart attacks, kidney failure, and, in some cases, death. The newer synthetic drugs are often poorly studied, too, and among the myriad substances available, many come with negative health impacts beyond those of their naturally occurring counterparts.
While illicit drug chemists work on new formulas, governments around the world try to regulate and ban the drugs quickly after they appear. Many countries use similarities in the chemical structure of drugs—like between fentanyl and its analogs—to ban novel psychoactive substances, or NPS. However, the approach varies by jurisdiction. For instance, in 2017, the Australian state of Victoria banned all psychoactive compounds with a few exceptions, including alcohol, tobacco, and medicinal cannabis. Other governments scramble to track the output of a global network of illicit labs.
Source : https://www.popsci.com/health/algorithm-drug-overdoses/