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.
0.6-1.2 mEq/LToxicity threshold: read below
Reference range
ConventionalmEq/L
0.61.2
SImmol/L
0.61.2
Combined adult band. LabVals does not publish separate men's, women's, or pediatric ranges for Lithium Level; those can be narrower than the band shown.
Lithium Level reference range, specimen, and conversion details
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)
Toxicity threshold
> 1.5 mEq/L is toxic; > 2.0 is a medical emergency
Convert any Lithium Level result between units on the unit converter.
What is the normal range for Lithium Level?
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).
What toxicity threshold is taught for Lithium Level?
For Lithium Level, the commonly taught toxicity threshold is: > 1.5 mEq/L is toxic; > 2.0 is a medical emergency.
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.
Watch for tremor, GI upset, ataxia, and confusion as toxicity develops.
Maintain steady sodium and fluid intake - dehydration raises lithium.
Draw a true 12-hour trough before the morning dose.
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