Venlafaxine (Effexor) and Desmethylvenlafaxine


Sunquest Code:VENDES  
Epic Code:LAB3872Epic Name:Venlafaxine
Synonyms:Effexor
Methodology:High performance liquid chromatography with ultraviolet detection
CPT Code:80338
Turnaround Time:Specimens are sent to reference laboratory Mon-Fri; results are reported within 3 days.


Collection Instructions

Specimen:Blood
Optimal Volume:6 mL
Minimum\Peds Volume:2.6 mL
Container:Red (no gel) (Green (lithium heparin, no gel), Green (sodium heparin, no gel))
Collection Instructions:Trough level preferred.


Processing and Shipping

Specimen Processing:Centrifuge and aliquot 3 mL, 1.2 mL minimum. Store at room temperature.
Shipping Instructions:Ship at room temperature.
Test Performed at or Referral Lab Lab Sendouts  (MedTox)
Referral Lab number:179


Interpretive

Reference Range:References ranges for venlafaxine and desmethylvenlafaxine have not been established. Expected concentrations for venlafaxine are 100-500 ng/mL with desmethylvenlafaxine concentrations of 200-400 ng/mL.


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