Highly potent fentanyl analogs: apnea from exposure to small quantities of ß-hydroxyfentanyl and furanylfentanyl

Context: Fentanyl analogs are synthetic opioids that bind to mu receptors with high potency. We report two cases where users developed apnea and required naloxone reversal after exposure to small quantities of the fentanyl analogs, furanylfentanyl and ß-hydroxyfentanyl. Case details: A 19 year-old woman reported insufflating a small number of granules of "fentanyl" powder and developed apnea. A 22 year-old woman touched her tongue to powdered...