An overdose of carfentanil, a deadly elephant tranquilizer, killed five people in Minnesota. The opioid is said to be 100 and 10,000 times more potent than fentanyl and morphine, respectively.
An overdose of carfentanil, a deadly elephant tranquilizer, killed five people in Minnesota. The opioid is said to be 100 and 10,000 times more potent than fentanyl and morphine, respectively.