Many plants are known to be poisonous, but in practice it is unusual for severe poisoning to occur. Children are the usual victims. Only two people are known to have died from plant poisoning in the UK since the early 1970s. The commonest effects of nettles and poison ivy are dermatitis followed by vomiting. Poisonous plants commonly ingested include hemlock, laburnum, deadly nightshade and green potatoes. Deadly nightshade (Atropa belladonna) contains hyoscyamine and hyoscine. When ingested these cause the anticholinergic effects of a dry mouth, nausea and vomiting, eventually leading to blurring of the vision, hallucinations, confusion and hyperpyrexia.