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Vanderbilt Pathology Laboratory Services

Test Directory



LAMOTRIGINE (LMT)

Department: Toxicology
Test Synonym(s): Lamictal, LMT
CPT Codes: 80299
Methodology: HPLC-UV
Reference Range: 2-20 mcg/mL. There is increased incidence of adverse effects with trough concentrations above 15 mcg/mL.
Tube Type: Red top tube
Specimen: Serum or plasma
Alternate Specimen: Plain red top (no gel), Lavender top (EDTA)
Pediatric Requirements: Red or dark green microtainer
Volume: 0.5 mL serum/plasma
Minimum Volume: 0.1 mL
Temperature: Refrigerated
Stability: Refrigerated: 7 days
Reasons for Rejection: Specimen collected in a gel tube
Days Performed: Monday - Friday
Times Performed: after 1:00 pm (specimens must be received before 1:00 to be processed the same day)
TAT: 24 hours
Special Instructions: Specimen must be received in lab by 1:00 pm to be processed the same day. Specimen cannot be collected in a gel tube.

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