MSH: A condition or physical state produced by the ingestion, injection, inhalation of or exposure to a deleterious agent.,CSP: condition or physical state produced by the ingestion, injection or inhalation of, or exposure to a deleterious agent.,MEDLINEPLUS: A poison is any substance that is harmful to your body. You might swallow it, inhale it, inject it or absorb it through your skin. Poisons can include Prescription or over-the-counter medicines taken in doses that are too high Overdoses of illegal drugs Carbon monoxide from gas appliances Household products, such as laundry powder or furniture polish Pesticides Indoor or outdoor plants Metals such as lead