A warning Wednesday from Vermont State Police about a powerful painkiller that if used incorrectly can be deadly.
Authorities say fentanyl is being sold and packaged as heroin in the Addison County area.
It's generally used intravenously in hospitals to treat pain. Police are cautioning people that injecting fentanyl or any drug that's not prescribed can most likely lead to an overdose or death.
Investigators are still trying to figure out who is behind the illegal activity.
Heroin tainted with fentanyl has already proven to be deadly elsewhere in the U.S.