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For a bodyweight around 70 kg (155 lb.), the lethal dose of arsenic would be closer to a gram than 100 mg. Current Queue | Current Queue for Medicine | Medicine archives Try the links in the MadSci Library for more information on Medicine.
The estimated lethal dose of fentanyl in humans is 2 mg. The recommended serum concentration for analgesia is 1â2 ng/ml and for anaesthesia it is 10â20 ng/ml. Blood concentrations of approximately 7 ng/ml or greater have been associated with fatalities where poly-substance use was involved.