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Gabapentin : 3557
Test CodeGABAQ or 3557
Alias/See Also
Neurotin,Neurontin®
CPT Codes
80171
Instructions
Draw sample 2 hours after last dose.
Separate serum or plasma from red cells as soon as possible; pipette or pour into plastic transport tube.
Separate serum or plasma from red cells as soon as possible; pipette or pour into plastic transport tube.
Transport Container
Preferred Specimen
1 mL serum collected in a red-top tube (no gel)
Alternative Specimen
Plasma collected in: EDTA (lavender-top) tube, sodium heparin (green-top) tube or lithium heparin (green-top) tube
Minimum Volume
0.5 mL
1 mL serum collected in a red-top tube (no gel)
Alternative Specimen
Plasma collected in: EDTA (lavender-top) tube, sodium heparin (green-top) tube or lithium heparin (green-top) tube
Minimum Volume
0.5 mL
Transport Temperature
Refrigerated.
Specimen Stability
Room temperature: 5 days; Refrigerated: 12 days; Frozen: 30 days
Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Gross hemolysis, Gel barrier/Serum Separator Tube (SST®)
Methodology
Chromatography/Mass Spectrometry
Setup Schedule
Tuesday - Saturday
Report Available
2-4 days (From receipt at performing Laboratory)
Reference Range
2.7-4.1: (peak) following a single dose of 900-1800 mg/day.
4.0-8.5: (peak) following a multiple dose of 900-1800 mg/day administration.
The reference range is evolving. Seizure control has been observed at levels in excess of 4 mcg/mL.
4.0-8.5: (peak) following a multiple dose of 900-1800 mg/day administration.
The reference range is evolving. Seizure control has been observed at levels in excess of 4 mcg/mL.
Clinical Significance
Gabapentin is an anticonvulsant drug commonly used as adjunctive therapy to treat partial seizures. Therapeutic drug monitoring is useful to optimize dose and to avoid toxicity.
Performing Laboratory
Quest Diagnostics
