Naloxone is an opioid-receptor antagonist. In other words, it has the ability to displace an opioid from the receptor site, and essentially reverse its activity to save overdose victims. However, a significant increase in the cost of naloxone has put it out of reach of the people who need it most.
The opioid epidemic has been declared a public health emergency, allowing for access to public health funding, in an effort to raise awareness and deploy public health initiatives. This declaration was in response to the growing numbers of overdoses and overdose deaths in the United States.