Specimen Requirements
Title
Venlafaxine and Metabolite, Serum or Plasma
Specimen Requirement
Patient preparation:
Pre-dose (trough) draw – At steady state concentration.
Collect red top or lavender EDTA, centrifuge and transfer 1.0 mL serum/plasma to a screw top plastic vial within 2 hours of collection, indicate sample type on tube and send.
Methodology
Quantitative Liquid Chromatography/Tandem Mass Spectrometry
Stability
Room temp: 14 days, Refrigerated: 14 days, Frozen: 14 days
Reference Range
The reference range is determined by the performing laboratory and will show on the report.
Turnaround
3-10 days performed Wednesday, Saturday
Clinical Use
Test Code
VENWP