Equally illicit fentanyl and carfentanil are particularly harmful opioids that will cause A fast overdose and Demise when abused, but carfentanil is more strong than fentanyl. A number of doses from the anti-overdose drug naloxone (Narcan) is probably not effective to reverse an overdose. Proceed studyingNEONATAL OPIOID WITHDRAWAL SYNDROME: Prolong