That picture is misleading. Although the pain relief effect of carfentalin is ~35 times higher than fentanyl, the lethal dose of both drugs is about the same.

That picture is misleading. Although the pain relief effect of carfentalin is ~35 times higher than fentanyl, the lethal dose of both drugs is about the same. So carfentanil is actually safer, in the sense that it has a higher therapeutic index. https://twitter.com/davidjuurlink/status/859227636400349184?lang=en https://twitter.com/davidjuurlink/status/859227636400349184?...