Both illicit fentanyl and carfentanil are really harmful opioids that could result in A fast overdose and Demise when abused, but carfentanil is more powerful than fentanyl. Numerous doses of your anti-overdose drug naloxone (Narcan) will not be effective to reverse an overdose. Carry on readingFentanyl For Sale Online. Fentanyl For Sale is a robus