opioidfentanyloverdoseFederal Lab Develops New Drug That Could Cut Fentanyl Overdose Recovery Time in HalfLawrence Livermore National Laboratory researchers have developed subetadex, a new compound that cuts fentanyl overdose recovery time from 35 to 17 minutes and remains active in the body for 7.5 hours — compared to Narcan's 30-80 minutes.March 3, 20268 min read