ARUP's Laboratory Test Directory

Gabapentin : 0090057

Mnemonic: GABAP

Methodology: Quantitative Liquid Chromatography-Tandem Mass Spectrometry
Performed: Sun-Sat
Reported: 1-3 days
Specimen Required: Collect: Plain red. Also acceptable: Lavender (K2 or K3EDTA) or pink (K2EDTA).

Specimen Preparation: Separate serum or plasma from cells within 2 hours of collection. Transfer 1 mL serum or plasma to an ARUP Standard Transport Tube. (Min: 0.5 mL)

Storage/Transport Temperature: Refrigerated.

Unacceptable Conditions: Whole blood. Gel separator tubes, light blue (citrate), or yellow (SPS or ACD solution).

Stability (collection to initiation of testing): After separation from cells: Ambient: 5 weeks; Refrigerated: 6 weeks; Frozen: 2 months
Reference Interval:
Effective February 19, 2013

Therapeutic Range: 2-20 µg/mL
Interpretive Data: The proposed therapeutic range for seizure control is 2-20 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.
CPT Code(s): 80299
Cross References: Gabapentin, Free (Gabapentin), Gabarone (Gabapentin), Neurontin (Gabapentin)