penicillamine

…of ethylenediaminetetraacetic acid (EDTA) and penicillamine. A lengthy treatment may be necessary, but recovery is usually complete, except when there is major involvement of the brain structures. Until the last half of the 20th century, damage to the brain caused by lead poisoning ended in death in about 25 percent…

…Bearn promoted the use of penicillamine, a chelating agent that lowers tissue concentrations of copper by drawing the element out of cells and facilitating its excretion in the urine. Bearn also encouraged patients to avoid eating foods that are high in copper.