DEA Warning Public About Counterfeit Pills Laced With Fentanyl

The DEA reports that cartels are producing counterfeit prescription drugs laced with fentanyl for distribution in North America. A significant portion of these pills contain potentially lethal doses of fentanyl, contributing to the opioid crisis. The DEA warns that these counterfeit pills are a major threat, with thousands of deaths in the US each year. In Arizona alone, over 1.4 million fentanyl pills were seized in the last fiscal year.

What is one of the primary drivers of the opioid crisis mentioned in the text?

What is the potential lethality of fentanyl as described in the text?