Venlafaxine & Metabolite




Test Mnemonic

VENLA

CPT Codes

  • 80299 - QTY (1)

Aliases

  • Effexor

Includes

  • Venlafaxine
  • O-desmethylvenlafaxine
  • Venlafaxine + O-desmethylvenlafaxine Total

Performing Laboratory

Mayo Clinic Dpt of Lab Med & Pathology


Specimen Requirements

Volume Type Container Collect Temperature Transport Temperature Special Instructions
1 mLSerumNo additive (Red) RefrigeratedDo not use serum separator tubes. Separate serum from cells within 2 hours of collection.

Minimum Specimen Requirements

Volume Type Container Collect Temperature Transport Temperature Special Instructions
0.4 mL     

Stability

Environmental Condition Description
Ambient28 days
Refrigerated28 days
Frozen28 days

Days Performed

Thu

Turnaround Time

2 - 5 days

Methodology

Name Description
Liquid Chromatography-Tandem Mass Spectrometry (LC-MS/MS) 

Reference Range

Venlafaxine & O-desmethylvenlafaxine
Sex Age From Age To Type Range Range Unit
       Normal100 - 400ng/mL

Special Info

Do not use serum separator tubes. Separate serum from cells within 2 hours of collection. This test is New York DOH approved.

Clinical Info

This test is useful for monitoring serum concentration during therapy, evaluating potential toxicity, and evaluating patient compliance. Draw blood immediately prior to next scheduled dose. Blood drawn from patients 12 hours after an oral dose is also appropriate. It is customary to treat the patient at bedtime with a dose, then collect specimen the following morning prior to next dose.