Naloxone (NARCAN® Nasal Spray)
In its over-the-counter form, naloxone is available as a nasal spray, which works in minutes and lasts 30-90 minutes. Naloxone nasal spray 4 mg (brand name NARCAN® Nasal Spray) is a medication that can rapidly reverse the effects of a known or suspected opioid overdose; (i.e., the person has signs of breathing problems and is unable to respond). It is now available without a prescription at all Walgreens locations nationwide.