300
How long does it take for naloxone to work and how long does it work for?
2-3 minutes
30-90 minutes may need repeat doses long acting opioids
may need high dose for fentanyl/carfentanil
carfentanil 10,000 X more potent than morphine, 5,000X more potent than heroin, 100Xmore potent than fentanyl.