Combating Illicit Xylazine Act

HR 1839, the Combating Illicit Xylazine Act, makes the illicit use and distribution of xylazine a federal crime by adding it to the Controlled Substances Act. The bill broadly defines xylazine to cover numerous chemical variants and prohibits human use or non-licit distribution, while preserving legitimate veterinary and pharmaceutical uses. It requires tracking xylazine in drug supply chains and mandates two reports to Congress within 1 and 4 years on its prevalence, sources, and whether it should be rescheduled. The bill directly affects individuals distributing or using xylazine illicitly, including as an additive to drugs like fentanyl, and aims to address its public health risks. Congress declared illicit xylazine an "emerging drug threat" under existing law.