Gabapentin (Neurontin) Drug Level
Label Mnemonic: GBPT
Epic Lab Code: LAB3185
Downtime Form: A-1a Miscellaneous Request
Commercial Mail-out Laboratory
5231 RCP
356-8593
Specimen(s):
Blood
Specimen Instructions:
Timing of specimen collection: Pre-dose (trough) draw - At steady state concentration.
Collection Medium:
Red top tube 5 mL (Clot Activator)
Minimum:
Preferred Minimum: 1 mL serum
Absolute Minimum: 0.2 mL serum
Rejection Criteria:
Whole blood. Gel separator tubes, light blue (citrate), or yellow (SPS or ACD solution).
Delivery Instructions:
Deliver to laboratory within 1 hour of collection.
Turn Around Time:
1-4 days upon receipt at reference laboratory
Reference Range:
Therapeutic Range: 2-20 μg/mL Toxic: Not well established
Interpretive Data:
Pharmacokinetics of gabapentin vary widely among patients, particularly those with compromised renal function. Adverse effects may include somnolence, dizziness, ataxia, and fatigue.
Methodology:
Quantitative Liquid Chromatography-Tandem Mass Spectrometry
CPT Code:
80171