The two illicit fentanyl and carfentanil are exceptionally unsafe opioids which could result in A fast overdose and Demise when abused, but carfentanil is more strong than fentanyl. Several doses of the anti-overdose drug naloxone (Narcan) will not be effective to reverse an overdose. Proceed readingNasal Spray: Retail store at as much as 25C; usua