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Mnemonic:    [LITH]
Name:    Lithium
Specimen:    1 mL serum from a Red SST or Red top tube.
Spec Stability:    Stable 24 hours refrigerated.
Reference Range:    0.5 - 1.5 mEq/L (therapeutic)
Critical Range:     >= 2.0 mEq/L
  Method:    Colorimetric Endpoint @600
Note:    Include time of last dose. For suspected toxicity, collect specimen anytime. For routine monitoring, specimen should be collected prior to the next dose.