Specimen Requirements
Title
Venlafaxine (Effexor)
Specimen Requirement
Patient prepartion:
Draw immediately before next scheduled dose. Also appropriate is drawing 12 hours after an oral dose.
Collect red top, centrifuge and transfer 1.0 mL serum to a screw top plastic vial within 2 hours of collection, indicate sample type on tube and send.
Methodology
Liquid Chromatography/Tandem Mass Spectrometry
Stability
Room temp: 28 days, Refrigerated: 28 days, Frozen: 28 days
Reference Range
By Report*
Turnaround
3-5 days performed Monday, Wednesday
Clinical Use
Test Code
VENW