Thanks to a partnership between pharmaceutical company Adapt Pharma and the Clinton Foundation’s Health Matters Initiative, every American high school will now be offered a supply of NARCAN, a nasal spray that rapidly treats opioid overdoses — and it’s all for free.

NARCAN is the first-ever nasal spray that can be used for the emergency treatment of heroin and prescription painkiller overdoses. And although it was only approved by the Food and Drug Administration in November 2015, its active ingredient, naloxone, has been used to treat opioid overdoses for the past 45 years.

Naloxone works by blocking opioid receptors in the brain, which reverses respiratory depression and facilitates normal breathing. According to Adapt Pharma, administering the nasal spray is easy and doesn’t require any medical training. It’s currently sold over the counter in 14 states.

Though opioid overdoses do occur in schools, they are rare. Nevertheless, they reflect a larger problem that is the nationwide heroin epidemic. Over the last decade, the number of people aged 25 and under who use heroin has doubled, while the number of overdoses from the drug have quadrupled . In 2014, the American Society of Addiction Medicine reports there were nearly 11,000 lethal overdoses from heroin alone, and an additional 19,000 from prescription painkillers.

"We understand the crucial role schools can play to change the course of the opioid overdose epidemic by working with students and families,” said Seamus Mulligan, chairman and CEO of Adapt Pharma, in a press release. “We also want every high school in the country to be prepared for an opioid emergency by having access to a carton of NARCAN Nasal Spray at no cost."

While states like Rhode Island have embraced the initiative, and now require naloxone to be stocked in all public high schools and middle schools, other states have not been so welcoming. This is due in part to school districts’ varying policies regarding administration of meds to students. These policies usually restrict this responsibility to school nurses. Because many of the nurses in these school districts travel between several school buildings, they’re not always on site to treat students.

“It’s a fair point,” Rain Henderson, CEO of the the Clinton Health Matters Initiative, told U.S. News and World Report, regarding the availability of staff members to administer the nasal spray at schools. “We are pressed for human resources, but we have to start somewhere.”

Other states, meanwhile, argue having NARCAN on hand will enable heroin use. Paul LePage, governor of Maine, has vetoed two proposals to make the spray more available, saying it would provide a false sense of security for users.

Amid the controversy, Henderson hopes the new availability of NARCAN will encourage “a dialogue among students, educators, health professionals, and families about the risks of opioid overdose, and ensure naloxone is available in schools that decide to take steps to address opioid overdose emergencies.”