My first memory of poison was a tale of the Brothers Grimm, Snow White or I have heard something on poisonous mushrooms.
J.F. Borzelleca (2001) illustrated the origin of “poison” in Principles and methods of toxicology (ed. W. Hayes):
“Toxin was originally tekw, a word meaning to run or flee, later becoming toxsa in Persian and toxon in Greek, meaning bow and arrow; the toxin meaning may have come from the poison used to tip the arrows, or, as Robert Graves suggested, from the yew tree taxus, from which arrows were best made and whose berries were long known to be poisonous. The word poison came by a devious route, like a long-delayed afterthought. It derives from poi, to drink, becoming potare in Latin, whence „potion” (and also „symposium” from sym, together, plus posis, to drink). “
I think it would be more than interesting to compare how and when researchers in various cultures met with the notion of poison and what can be the original meaning of this word in their mother tongue?