SPRINGFIELD — In an effort to curb the growing threat of synthetic drugs, State Senator Julie Morrison passed legislation in the Senate to regulate the use of xylazine — a powerful animal tranquilizer often mixed with fentanyl and tied to overdose deaths.

“We’re seeing xylazine turning already dangerous drugs into something even more lethal,” said Morrison (D-Lake Forest). “By classifying the drug as a controlled substance, we’re giving law enforcement a path to respond to this escalating crisis without disrupting approved usage by veterinary professionals.”

Senate Bill 1773 would update the state’s controlled substance classifications to better address emerging drug trends, such as the mixing of fentanyl and xylazine. The bill, an initiative of the Illinois State Police, aims to provide law enforcement with more effective tools to combat the evolving challenges posed by illicit drug use. It would categorize xylazine as a Schedule III controlled substance and clear up legal definitions to align Illinois law with federal standards, preventing loopholes that could put people at risk.

Xylazine, also known as “tranq,” is not intended for human use and has been linked to a rising number of overdose deaths. While xylazine poses a risk when misused, it is an FDA-approved animal sedative used by veterinarians, euthanasia technicians and wildlife biologists. Senate Bill 1773 includes exemptions to ensure these professionals can continue to use the substance in approved and regulated ways, such as surgery and pain relief in large animals.

“This legislation is about keeping a dangerous drug out of the wrong hands,” said Morrison. “As new threats emerge, we have to stay ahead of the curve to protect lives.”

Senate Bill 1773 passed the Senate on Wednesday.