91107      Gabapentin
Specimen:
  Collect: One 10 mL Red Top

Also Acceptable
One 4 mL Lavender (EDTA)
One 4 mL Green Top (Na Heparin)
One 4 mL Gray Top 
  Submit: 1.5 mL (Min:0.8 mL) Serum. Submit Refrigerated. Submit in a Standard Transport Tube.

Also Acceptable
1.5 mL (Min:0.8 mL) Plasma. Submit Refrigerated. Submit in a Standard Transport Tube. 
  Rejection Criteria: Use of separator tubes 
  Stability: Ambient: 5 Week(s); Refrigerated: 6 Week(s); Frozen: 2 Month(s); Incubated: Unacceptable 
Methodology: High performance liquid chromatography (HPLC) 
Performed: Mon-Fri 
Reported: 2-5 Day(s) 
CPT Codes:
82491 - Chromatography, Column
Interpretive Data:
The proposed therapeutic range for seizure control is 2-10 ug/mL. Concentrations that exceed 25 ug/mL may contribute to adverse effects. Pharmacokinetics of gabapentin vary widely among patients, particularly those with compromised renal function.