Gabapentin
Order Code:
GABAP
Test Summary
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.
Aliases
- Neurotin
Specimen Collection
Special Instructions
N/A
Preferred Specimen
1 mL serum collected in a red-top tube (no gel)
Minimum Volume
0.5 mL
Instructions
Separate serum or plasma from red cells as soon as possible; Pipette or pour into plastic transport tubes.
Patient Preparation
Draw sample 2 hours after last dose
Storage
Transport tube
Transport Temperature
Room temperature
Specimen Stability
- Room temperature: 5 days
- Refrigerated: 12 days
- Frozen: 30 days
Limitations
N/A
Other Acceptable Specimens
Plasma collected in: EDTA (lavender-top), sodium heparin (green-top), or lithium heparin (green-top) tube
Unacceptable Specimens
Gel barrier/Serum Separator Tube (SST®) • Gross hemolysis
Order Code
GABAP
EPIC (Premier) Code
LAB211
Includes
N/A
CPT Code
- 80171
Billing Code
- 670320
CPT Statement
Methodology
Chromatography/Mass Spectrometry
FDA Status
This test was developed and its analytical performance characteristics have been determined by Quest Diagnostics. It has not been cleared or approved by the U.S. Food and Drug Administration. The FDA has determined that such clearance or approval is not necessary. This assay has been validated pursuant to the CLIA regulations and is used for clinical purposes.
Physician Attestation of Informed Consent
N/A
Testing Laboratory
Quest Diagnostics Nichols Institute
14225 Newbrook Drive
Chantilly VA, 20153
14225 Newbrook Drive
Chantilly VA, 20153
Department
Reference Testing
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.
Setup Schedule / Expected Turnaround Time
Monday - Saturday morning; Report available: Next day
Specimen Collection
Special Instructions
N/A
Preferred Specimen
1 mL serum collected in a red-top tube (no gel)
Minimum Volume
0.5 mL
Instructions
Separate serum or plasma from red cells as soon as possible; Pipette or pour into plastic transport tubes.
Patient Preparation
Draw sample 2 hours after last dose
Storage
Transport tube
Transport Temperature
Room temperature
Specimen Stability
- Room temperature: 5 days
- Refrigerated: 12 days
- Frozen: 30 days
Limitations
N/A
Other Acceptable Specimens
Plasma collected in: EDTA (lavender-top), sodium heparin (green-top), or lithium heparin (green-top) tube
Unacceptable Specimens
Gel barrier/Serum Separator Tube (SST®) • Gross hemolysis
Result Information
Methodology
Chromatography/Mass Spectrometry
Testing Laboratory
N/A
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.
Setup Schedule / Expected Turnaround Time
Monday - Saturday morning; Report available: Next day