
TIL about carfentanil, an ultra-potent analogue of fentanyl. It is about 4,000 times stronger than heroin and 100 times more potent than fentanyl. It is strictly approved for veterinary use in large animals but has been found in illicit drugs. It takes very large doses of naloxone to reverse.
en.wikipedia.orgu/ApprehensiveStill412 — 4 days ago