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