Fentanyl isn't too potent to be consumed as-is, but the dosage is very very small. The amount of fentanyl that will kill you is literally invisible. The LD50

Fentanyl isn't too potent to be consumed as-is, but the dosage is very very small. The amount of fentanyl that will kill you is literally invisible. The LD50 appears to be well under 0.01mg/kg (that is, a milligram will kill a 220lb person).