3-Methylfentanyl was also reported by media as the identity of the anaesthetic " gas " Kolokol-1 delivered as an aerosol during the Moscow theater hostage crisis in 2002 in which many hostages died from accidental overdoses , 3-methylfentanyl was later ruled out as the primary agent used . The opiate antidote naloxone was on-hand to treat the victims of the crisis , but , whether due to their incarceration or lack of food water and sleep , or due to the novel nature of the still-unconfirmed compound used , acute symptoms continued to develop , resulting in many fatalities despite the administration of naloxone
Moscow theater hostage crisis
Moscow theater hostage crisis
3-Methylfentanyl