Carfentanil or carfentanyl, sold under the brand name Wildnil, is an extremely potent opioid analgesic used in veterinary medicine to anesthetize large animals such as elephants and rhinoceroses. From Wikipedia
The synthetic opioid, 100 times more potent than fentanyl, has seen a 700% increase in fatalities over the past year, prompting calls for urgent monitoring and prevention measures.
