Fentanyl, an opioid 50 times stronger than heroin, continues to pose hazards to both its users and emergency responders, with no reduction of use in sight.

The drug typically is mixed with powder heroin, which causes a higher potential for overdose. When emergency responders need to provide assistance to those experiencing an overdose, they too can be exposed to fentanyl through the inhalation of the powder.

Because of this, NIOSH and the CDC have posted interim guidance which steps workers can take to reduce occupational exposure.