The Food and Drug Administration (FDA) approved a third over-the-counter version of naloxone nasal spray Tuesday, in a move the agency said could save lives and reduce costs.  The agency approved another Rextovy, a 4 milligram naloxone nasal spray for the emergency treatment of opioid overdose . FDA said consumers may directly buy it in pharmacies, convenience stores and online.  Naloxone is a... ...read more read less