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Test Name:
Gabapentin, Serum or Plasma
- SBMF No:
44567 - Performance Lab Name:
ARUP Laboratories - Test Mnemonic:
GABAP - ABN:
Not required - CPT Code:
80299 - LOINC Code:
9738-6 - Ref Lab Test No:
0090057 - Also Known As:
Gabarone
Neurontin - Spec Type:
Serum - Spec Container:
Red top (serum) tube - Alt Spec Type:
Plasma - Alt Spec Container:
Lavender top (EDTA), green top (sodium heparin), or gray top (fluoride/oxalate) tube - Pref Vol:
1.5 mL - Min Vol:
0.5 mL - Fasting:
No - Spec Collect:
Do not use gel-barrier tubes for specimen collection
Routine venipuncture - Spec Process:
Serum sample tubes, clot 30 minutes
Promptly centrifuge 15 minutes
Immediately transfer serum or plasma to separate plastic tube - Spec Store Transport:
Refrigerated - Spec Stability:
After separation from cells:
5 weeks room temperature (20-30°C)
6 weeks refrigerated (2-8°C)
2 months frozen (-20°C) – Do not use frost-free units that undergo repeated freeze/thaw cycles - Methodology:
Liquid Chromatography-Tandem Mass Spectrometry (LC-MS/MS) - Clinical Significance:
Refer to:
- Reference Range:
Therapeutic range not well established
Interpretive Data:
The proposed therapeutic range for seizure control is 2-10 µg/mL. Concentrations that exceed 25 µg/mL may contribute to adverse effects. Pharmacokinetics of gabapentin varies widely among patients, particularly those with compromised renal function. - Day Run:
Sun-Sat (daily) - Time Reported:
2-3 days - Test Type:
TOX-TDM
