All tests · Therapeutic Drug Levels
Therapeutic Drug Levels
Normal range 0.6–1.2 mEq/L (0.6–1.2 mmol/L SI). Specimen: Serum (trough, 12 h post-dose).
Also known as: serum lithium.
| Specimen | Serum (trough, 12 h post-dose) |
|---|---|
| Conventional range | 0.6–1.2 mEq/L |
| SI range | 0.6–1.2 mmol/L |
| Conversion factor | ×1 (conventional → SI) |
| Critical value | > 1.5 mEq/L is toxic; > 2.0 is a medical emergency |
| Panel | Therapeutic Drug Levels |
Convert any Lithium Level result between units on the unit converter.
The standard teaching reference range for Lithium Level is 0.6–1.2 mEq/L in conventional units, or 0.6–1.2 mmol/L in SI units. This value is measured in serum (trough, 12 h post-dose).
A commonly taught critical (panic) value is > 1.5 mEq/L is toxic; > 2.0 is a medical emergency. Critical results are reported to the provider immediately under your facility's policy.
Source: Adult reference values compiled from Pagana & Pagana, Mosby's Diagnostic and Laboratory Test Reference, and Fischbach & Dunning, A Manual of Laboratory and Diagnostic Tests. Reference ranges vary by laboratory, method, age, sex, and population — always use the range printed on the actual result.
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