It is the same gas that is found in the car exhaustion. Arsenic: Arsenic is a powdered trioxide of arsenic that is basically used in manufacturing glass and also as a pesticide and rat poison. Rat Poison in Cigarettes. There are many essential rat poison ingredients, that are found in the cigarettes.hile smoking cigarettes, people hardly think about the harmful chemicals present in them, neither do they think about the effects of smoking on the body. There is just a strong desire to evade the stress and get relaxed for a while.