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The word "poison" is defined as a substance that can cause illness or death if it is introduced or absorbed into the body. As a result, a poison can refer to many things including medicines, including prescription drugs, over-the-counter drugs, herbal remedies, alcohol, and illegal drugs. Common household products such as bleach and other household cleansers, bug killers, weed killers and anti-freeze. Chemicals used at the workplace, bites and stings from animals, toxins released from mushrooms or plants and fumes and gases. People can intentionally ingest poisons or they may be exposed accidentally. In some cases they may not even be aware that they've been exposed to poison.