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Levetiracetam, Immunoassay
Test CodeKEPRA
CPT Codes
80177
Preferred Specimen
1 mL serum collected in a red-top tube (no-gel)
Patient Preparation
If Brivaracetam has been prescribed, order test code 15142 for Levetiracetam by LC/MS/MS.
Optimum time to collect sample: 0.5 to 1 hour pre-oral dose, trough at steady state (2 weeks after onset of treatment).
Minimum Volume
0.5 mL
Other Acceptable Specimens
Plasma collected in: EDTA (lavender-top) tube, EDTA (royal blue-top) tube, sodium heparin (green-top) tube
Transport Temperature
Room temperature
Specimen Stability
Room temperature: 7 days
Refrigerated: 21 days
Frozen: 30 days
Refrigerated: 21 days
Frozen: 30 days
Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Specimens collected in gel barrier tubes (SST • PST) • Unspun red-top tube (no-gel)
Methodology
Immunoassay (IA)
Setup Schedule
Sets up 6 days a week.
Report Available
Reports in 2 to 3 days.
Reference Range
6.0-46.0 mcg/mL
Clinical Significance
LEV is currently used as an anti-epileptic drug for the treatment of adult partial seizures particularly as an add-on therapy for refractory patients. It also has potential for other anxiety and cognitive disturbances.
Performing Laboratory
Quest Diagnostics Valencia Nichols Institute
27027 Tourney Road
Valencia, CA 91355-5386
Last Updated: January 9, 2024