Saturnism, or lead poisoning, is defined by clinical symptoms (affecting primarily the nervous, hematopoietic, gastrointestinal, cardiovascular, musculoskeletal, renal and reproductive systems) compatible with exposure, in the short or long term, to lead or to its compounds, and can manifest as acute or chronic symptoms, pursuant to the intensity and duration of the signs and symptoms. Measuring serum concentration is the primary method for diagnosing and accompanying exposed workers. Presently, elevated lead counts are reversed by using drugs whose effectiveness is contested on various fronts. Experimental studies shows the efficacy of homeopathic preparations in controlling blood lead levels in laboratory animals, creating the need for controlled studies that evaluate the effectiveness and safety of these preparations in humans.The objective of this study was evaluate the effectiveness of the homeopathic preparation Plumbum metallicum in reducing the blood lead level of workers exposed to this metal.

Inclusion Criteria:

• had not taken a leave of absence for any reason for a period greater than seven days in the 60 days prior to the intervention;
• where in good medical condition, as analyzed by their medical records and physical exam;
• had an initial blood lead level less than the maximum biological concentration permitted, which is 60µ/dL in Brazil.

Exclusion Criteria:

• workers who, in the last six months, had used medication that interferes/d with the level of lead in the blood, such as EDTA, BAL, penicillinase and DMSA;
• workers who had the right to vacation during the study period;
• workers who did not give their consent to participate in the study.