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The ideal poison for committing a homicide must be: odorless, tasteless, difficult to detect and mimic the symptoms of naturally occurring diseases, finds Anil Aggrawal, professor of Forensic Medicine at the Maulana Azad Medical College in New Delhi, India.
Calamine comes in pink and clear and is a classic antidote. An oatmeal bath can also calm poison ivy symptoms. You can buy a commercial oatmeal preparation (Aveeno), or make your own by wrapping a half cup of uncooked rolled oats in a piece of cloth and letting the cereal soak in the bath water.