Understanding Lab Tests for Lithium Toxicity
Written by Private MD Labs Medical Writing Team • Last Updated: September 8, 2025
Lithium toxicity occurs when lithium levels in the blood become dangerously elevated, either from excessive intake or decreased elimination of the medication. This serious condition requires immediate medical attention and can be definitively diagnosed through blood testing.
Recommended Test
Lithium
This test directly measures lithium concentration in the blood to diagnose toxicity. Elevated lithium levels confirm the diagnosis and help determine the severity of toxicity. This testing is crucial because lithium toxicity can progress to serious complications including kidney failure, coma, or death if not promptly identified and treated.
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Diagnosing Lithium Toxicity
While symptoms such as nausea, vomiting, diarrhea, dizziness, tremors, and confusion may suggest lithium toxicity, a blood test measuring lithium levels is essential for confirming the diagnosis. This direct measurement allows healthcare providers to determine if lithium concentrations have reached toxic levels and guide appropriate treatment.
When to Test
Lithium level testing should be performed immediately if toxicity is suspected, especially in patients taking lithium who develop symptoms like confusion, severe tremors, or gastrointestinal distress. Regular monitoring is also important for patients on lithium therapy to prevent toxicity from developing.
Important Considerations
The information here is for educational purposes only and is not a substitute for professional medical advice. Always consult with a healthcare provider for diagnosis and treatment. Lithium toxicity is a medical emergency requiring immediate professional care.
