Chelation therapy uses special drugs that bind to metals in your blood. You get the chelating medicine through an intravenous (IV) tube in your arm. It’s also available in pill form. Once the drug has attached to the metal, your body removes them both through your pee. Metals that can be removed with chelation therapy include lead, mercury, and arsenic. Before you get this treatment, your doctor will do a blood test to make sure you have metal poisoning.