Test Code VENLA Venlafaxine, Serum
Reporting Name
Venlafaxine, SUseful For
Monitoring serum concentration during therapy
Evaluating potential toxicity
Evaluating patient compliance
Method Name
Liquid Chromatography-Tandem Mass Spectrometry (LC-MS/MS)
Performing Laboratory

Specimen Type
Serum RedSpecimen Required
Collection Container/Tube: Red top
Submission Container/Tube: Plastic vial
Specimen Volume: 1 mL
Collection Instructions:
1. Draw blood immediately before next scheduled dose.
2. 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.
3. Centrifuge and remove serum from cells within 2 hours of collection.
Specimen Minimum Volume
0.4 mL
Specimen Stability Information
Specimen Type | Temperature | Time | Special Container |
---|---|---|---|
Serum Red | Refrigerated (preferred) | 28 days | |
Ambient | 28 days | ||
Frozen | 28 days |
Reject Due To
Gross hemolysis | OK |
Gross lipemia | OK |
Gross icterus | OK |
Reference Values
Venlafaxine + O-desmethylvenlafaxine: 195-400 ng/mL
Day(s) and Time(s) Performed
Thursday; 4 p.m.
Test Classification
This test was developed and its performance characteristics determined by Mayo Clinic in a manner consistent with CLIA requirements. This test has not been cleared or approved by the U.S. Food and Drug Administration.CPT Code Information
80299
LOINC Code Information
Test ID | Test Order Name | Order LOINC Value |
---|---|---|
VENLA | Venlafaxine, S | 62849-5 |
Result ID | Test Result Name | Result LOINC Value |
---|---|---|
83732 | Venlafaxine | 9630-5 |
30195 | O-desmethyl Venlafaxine | 9630-5 |
32182 | Venlafaxine+O-Desmethylvenlafaxine | 62849-5 |
Forms
If not ordering electronically, complete, print, and send a Therapeutics Test Request (T831) with the specimen.