Over the years, hundreds of new synthetic drugs that mimic the effects of illegal and legal substances have emerged. The underground nature of each drug’s development and distribution makes its international popularity hard to track. Now, using wastewater from the days near the 2021 New Year holiday, researchers report an increased international usage of some synthetic drugs, including eutylone and 3-methylmethcathinone (3-MMC) compared to the previous year.
