Test Details
Mnemonic
VENM
Ordering Code
3600382
CPT-4 Code(s)
80338 (Alt code: G0480)
Specimen Information
Patient Preparation
Pre-dose (trough) draw - At steady state concentration.
Collect
Red top
Specimen Preparation
Centrifuge, separate serum from cells within 2 hours of collection and send 1.0 mL serum in a screw capped plastic vial.
Alternate Specimen
Plasma: Lavender EDTA
Minimum Volume
0.5 mL
Transport Temperature
Refrigerated
Rejection Criteria
Whole blood, Serum separator tube (SST), Light blue sodium citrate, or yellow (SPS or ACD
Solution).
Solution).
Stability
Room temperature: 14 days
Refrigerated: 14 days
Frozen: 14 days
Refrigerated: 14 days
Frozen: 14 days
Methodology
Quantitative Liquid Chromatography/Tandem Mass Spectrometry
Reference Range
Therapeutic range
(Venlafaxine and o-Desmethylvenlafaxine)
195-400 ng/mL
Toxic range
(Venlafaxine and o-Desmethylvenlafaxine)
>= 800 ng/mL
(Venlafaxine and o-Desmethylvenlafaxine)
195-400 ng/mL
Toxic range
(Venlafaxine and o-Desmethylvenlafaxine)
>= 800 ng/mL
Performing Laboratory
ARUP Reference Laboratory
New York DOH Approval Status
Yes