No matter at how many sources you look: human lethal levels are low, animals levels are high. Of course getting the LD50 for humans isn't that practical but the differences are so huge.
An example for fentanyl: https://www.caymanchem.com/msdss/23580m.pdf oral TDLO woman 100 mcg/kg, oral LD50 rat 18 mg /kg, oral ld50 mouse 368 mg/kg.
The lowest lethal dose is not the same as the LD50, but estimated lethal doses for humans are much lower than for humans ? How come ? Is the information doctored ?
An example for fentanyl: https://www.caymanchem.com/msdss/23580m.pdf oral TDLO woman 100 mcg/kg, oral LD50 rat 18 mg /kg, oral ld50 mouse 368 mg/kg.
The lowest lethal dose is not the same as the LD50, but estimated lethal doses for humans are much lower than for humans ? How come ? Is the information doctored ?