Arsenic Found in lots of places, including occurring naturally in the human body. Used either as yellow oxide, white oxide or vapour, which smells of garlic. White oxide is virtually tasteless and easily masked by food. Can be given cumulatively - fatal dose can build up slowly over time. In this case, symptoms can look like food poisoning.
Symptoms vary according to type and method.
White oxide poisoning starts with irritation of throat, nausea, faintness, depression. Then vomiting, tinged with blood.and mucus. Severe abdominal pains, exacerbated by touch. Tongue is white and furry and throat constricted. Diarrheoa after 12 - 18 hours.