Acute lead poisoning in two users of illicit methamphetamine

Area of Science:

• Toxicology
• Hematology
• Internal Medicine

Background:

• Acute lead poisoning presents diagnostic challenges, mimicking hepatitis, nephritis, and encephalopathy.
• Intravenous drug use, specifically methamphetamine, is an underrecognized route for lead exposure.
• Early diagnosis is crucial for effective treatment and prevention of long-term complications.

Observation:

• Two cases of intravenous methamphetamine users presented with abnormal liver function, low hematocrit, and elevated blood lead levels.
• Basophilic stippling of red blood cells was a consistent and critical laboratory finding in both patients.
• Lead contamination was confirmed in one of the illicit drug samples.

Findings:

• Elevated blood lead levels were confirmed in both patients.
• Treatment with edetic acid (EDTA) led to significant lead excretion and symptom resolution.
• Basophilic stippling served as a key diagnostic indicator for lead poisoning in this cohort.

Implications:

• Highlights the importance of considering lead poisoning in patients with compatible symptoms and risk factors, including intravenous drug use.
• Emphasizes the diagnostic value of basophilic stippling in identifying lead poisoning.
• Suggests the need for awareness among healthcare providers regarding potential lead contamination in illicit drug supplies.