A condition resulting from ingestion of plants such as snakeroot (Eupatorium urticaefolium) or jimmy-weed (Haplopappus heterophyllus). It is common in domestic animals and may occur in humans as a result of ingesting the plants or, more commonly, from drinking milk or eating the meat of poisoned animals. Symptoms are weakness, anorexia, nausea and vomiting, prostration, and possibly death.