Public health and law enforcement agencies around the U.S. are scrambling to blunt the impact of xylazine, a deadly new threat to Americans who use street drugs.
That effort is complicated — some critics say crippled — by the fact that no one’s sure who’s mixing the dangerous chemical into fentanyl, methamphetamines and other street drugs. It’s also unclear why they’re doing it.
“Why has it gone national? I don’t know why. Tough question out of the gate,” said Dr. Nabarun Dasgupta, a researcher at the University of North Carolina who tests street drugs collected around the country.
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