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Lithium details

What Lithium shows

This test measures blood levels of lithium, a medication used primarily to treat bipolar disorder and, in some cases, treatment-resistant depression. Lithium has a notably narrow therapeutic window โ€” meaning the difference between an effective dose and a toxic one is relatively small โ€” so regular blood level monitoring is a standard and essential part of lithium treatment, helping ensure the dose stays both effective and safe. Levels can be affected by hydration status, kidney function, salt intake, and certain other medications, all of which are considerations when interpreting a result.

Tests that include Lithium

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