A Case of Lead Poisoning After Ingestion of Herb Pills

Oh, Se Won; Lee, Hyung Jai; Chae, Hong Jae; Lee, Sung Kwan; Moon, Jai Dong; Cho, Deok

Abstract

BACKGROUND: Lead is a common environmental metal and has been used for various purposes for a long time, leading to frequent reports of lead poisoning. The concern about lead poisoning starts has been mostly focused on occupational exposure and is linked to the prevention and management of lead exposure in refining and manufacturing processes. Nowadays, however, there is growing concern about nonoccupational lead exposure by many pollutants. Especially, lead poisoning by herb medicine has commonly been observed in clinics in Southeast Asia and South Korea. This case report contains diagnosis of inpatients who suffered from lead poisoning from a herb medicine, arthritis remedy and who complained of abdominal symptoms and dizziness. The study purpose was to awaken our healthful interest in lead poisoning.
CASE REPORT
A 53-year-old female patient complaining of abdominal pain, dizziness, and numbness of hand and foot came to our hospital due to the continuation of her anemic finding symptoms while undergoing treatment at a secondary hospital. Her past medical history was unremarkable except she had taken herb pills for about a year which were administered by herb medicine to treat arthritis. Physical examination was unremarkable except for oral ulcer finding. Hemoglobin was 8.5 g/dl, reticulocyte count was 4.10%, bilirubin was 1.3 mg/dl (direct 0.3 mg/dl), and Zinc protoporphyrin 169.12 ug/dl. In urinalysis results, WBC increased to 30~39 /HPF, While AST/ALT, BUN/Cr, PT/aPTT, and nerve conduction velocity were normal. Basophilic stippling was observed through peripheral blood smear. The blood lead level was 80.4 microgram/dl and the urine lead level continued to increase to 541 microgram/l. Analysis of the pills that the patient had been taking showed that they contained 30 mg/g lead. By oral chelation therapy with D-penicillamine four times per day for five days, the patient's hemoglobin increased to 11.8 g/dl, while blood lead level decreased to 39.2 microgram/dl, and urine level to 196 microgram/l. Although the soles of her feet remained cold, but other symptoms and anemia finding were improved considerably. However, after discontinuing D-penicillamine medication, the blood lead level increased to 41.4 microgram/dl again. The further administration of D-penicillamine for five days reduced the blood lead level to 31.5 microgram/dl. At two years after the discontinuance of D-penicillamine, the followup findings were normal; hemoglobin was 13.1 g/dl, hematocrit 39.6%, reticulocyte count 1.22%, blood lead level 13.3 microgram/dl, and urine lead level 9.17 microgram/l.
CONCLUSION
After taking herb medicine pills for one year, the patient was admitted to hospital chiefly complaining of abdominal pain, dizziness, and numbness of the hand and foot. The high blood and urine and lead levels and lead chemical analysis of the herb pills confirmed lead poisoning which was treated with D-penicillamine for five days. The follow-up result after two years indicated normal blood and urine lead levels.