Treatment of Lead Poisoning in Adults with Severe Encephalopathy or Blood Lead Level Exceeding 100 µg/dL

Clinical Scenario

This protocol applies to adults (age 18 years or older) presenting with lead poisoning who have either severe encephalopathy or a blood lead level exceeding 100 µg/dL. Both conditions represent high-severity presentations requiring a specific escalated approach.

Treatment Approach

Management involves a chelation strategy initiated with a specific sequence of chelating agents. Treatment begins with one agent and is followed within hours by a combination regimen, with the choice of subsequent agents depending on whether oral or intravenous administration is appropriate for the patient.

        The full sequence — including which agents to use, how they are combined, when each is phased out, and how long treatment continues — is detailed in the structured protocol.
      

Dosing, duration, and the complete algorithm are not shown here.

Treatment Goals

Resolution or improvement of symptoms
Achievement of acceptable blood lead levels

Instant Access to Structured Evidence-Based Regimens

References

In the presence of severe encephalopathy or when blood lead levels exceed 100 µg/dL, chelation should start with dimercaprol (BAL) followed in 4 hours by another dose of BAL and either succimer (if oral administration is tolerated) or CaNa2-EDTA (if intravenous infusion is required).

BAL treatment is phased out while treatment with one of the other chelating agents is continued (typically for 5 days), followed by decreased or interrupted dosing because continued chelator usage is associated with decreasing amounts of urinary lead excretion.

Once initiated, chelation therapy should be continued until symptoms improve and acceptable blood lead levels are achieved.

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