The two illicit fentanyl and carfentanil are extremely dangerous opioids that will cause a quick overdose and Demise when abused, but carfentanil is much more strong than fentanyl. A number of doses from the anti-overdose drug naloxone (Narcan) is probably not effective to reverse an overdose. Keep on studyingNEONATAL OPIOID WITHDRAWAL SYNDROME: Pr