There is a term in pharmacology – LD50 – it is the dose that 50% of the animal/human taking such a dose – 50% would die ! https://go.drugbank.com/drugs/DB00813 Fentanyl has an intravenous LD50 of 2.91mg/kg in rats1, an oral LD50 of 18mg/kg in rats and 368mg/kg in mice.MSDS The LD50 in humans is not known. […]
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