“Children who received both CaEDTA and BAL had a greater percent decrease in ZnP at four to eight months postchelation, but there was no difference in percent decrease in lead levels.”
“The addition of BAL to CaEDTA for treatment of children with lead levels of 2.41 μmol/L (50 μg/dL) to 2.90 μmol/L (60 μg/dL) produced greater toxicity and does not seem to prevent repeat chelations within six months.”