Each illicit fentanyl and carfentanil are particularly risky opioids which will bring about a quick overdose and Demise when abused, but carfentanil is a lot more strong than fentanyl. Numerous doses from the anti-overdose drug naloxone (Narcan) is probably not effective to reverse an overdose. Keep on readingActually Freaked Out!! Fentanyl OD or W