Arsenic is a very toxic substance that is also found in food, water and household items. Tobacco smoke, laundry detergent, bone meal, sea food, beer and even drinking water are a few of the items arsenic can be consumed from. Headaches, sleepiness, confusion, and even convulsions can be the effects of arsenic poisoning. Vomiting, diarrhea, kidney, liver and lung problems can occur, including death in extreme cases.