The Department of Health and Human Resources has not yet told Congress

if fentanyl should be added to the drug testing procedures for

transportation workers. It hasn't been added in the past because it is

usually mixed in with the drug testing procedures of heroin. Fentanyl is a

synthetic opioid that is 80 to 100 times stronger than morphine. It might

start being tested because experts say that fentanyl is starting to be used

alone, without in other substances being mixed in. Which is why just testing

fentanyl by itself is a hot topic issue. The Center for Disease Control

reports synthetic opioids are now the deadliest illicit drug used across the

country.