Toxicity in human One to ten milligrams per kilogram body weight are said to be deadly to humans Ludewig Regenthal et al 2007 do list 1 5 6 mg aconitine nitrate per os as the lethal dose for a man This is coherent with figures of other authors including the classical work of Louis Lewin Gifte und Vergiftungen 1928 which is considered by many toxicologists as one of the fundamental works of modern toxicology I myself was teached in lectures that aconitine is the deadliest alcaloid found in european plants with dosis leth singula in order of 5 10 mg p o I ll change therefore the figure given in the article 84 163 126 131