Mexico sounds alarm over 'zombie drug' sedative in opioids

MEXICO CITY (Reuters) - Mexican public health officials are sounding an alarm after a study discovered the presence of animal tranquilizer Xylazine in opioids in cities on the country's northwest border with the United States.

Known popularly in English by names like "tranq dope" and "zombie drug," Xylazine cut into heroin and fentanyl has in recent years worsened the opioid scourge in U.S. cities like Philadelphia.