ARUP Test Catalog
ARUP Consult Guide
Lab Tests Online
Carbamazepine (Tegretol) Level

Mnemonic:    [CARBAM]
Name:    Carbamazepine (Tegretol) Level
Specimen:    1 mL serum from a Red SST or Red top tube, or plasma from a Green PST.
Spec Stability:    Stable 5 days refrigerated.
Reference Range:    4 - 12 ug/mL (therapeutic)
Critical Range:    > 20 ug/mL
  Method:    Enzyme Immunoassay
Note:    For suspected toxicity, collect specimen anytime. For routine monitoring, specimen should be collected prior to the next dose. Peak levels are achieved approx. 6 hours after ingestion.