Lowest exposure: Impaired abilities (patients may be asymptomatic) |
Decreased learning and memory |
Decreased verbal ability |
Early signs of hyperactivity or ADHD |
Lowered IQ |
Impaired speech and hearing functions |
Low exposure |
Myalgia or paresthesia |
Mild fatigue |
Irritability |
Lethargy |
Occasional abdominal discomfort |
Moderate exposure |
Arthralgia |
General fatigue |
Difficulty concentrating |
Muscular exhaustibility |
Tremor |
Headache |
Diffuse abdominal pain |
Vomiting |
Weight loss |
Constipation |
High exposure |
Paresis or paralysis |
Encephalopathy
|
Lead line (blue-black) on gingival tissue |
Colic (intermittent, severe abdominal cramps) |
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