Abstract: This article focuses on venena in medieval medical practice and collections of recipes. Remedies are limited to lists of useful ingredients for this or that affliction, sometimes complemented by precisions on the mode of administration. A definition of venemum emerges from these collections, as well as an understanding of how its effects were countered. We can also get a sense of the place reserved for poisons in this therapeutic literature and, de facto, the feelings accompanying the perceived risks of poisoning.