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Test Code VENLA Venlafaxine, Serum

Reporting Name

Venlafaxine, S

Useful For

Monitoring serum concentration during therapy

 

Evaluating potential toxicity

 

Evaluating patient compliance

Performing Laboratory

Mayo Clinic Laboratories in Rochester

Specimen Type

Serum Red


Specimen 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. Serum 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, draw specimen the following morning prior to next dose.

3. Centrifuge and remove serum from cells within 2 hours of draw.


Specimen Minimum Volume

0.4 mL

Specimen Stability Information

Specimen Type Temperature Time
Serum Red Refrigerated (preferred) 28 days
  Ambient  28 days
  Frozen  28 days

Reference Values

Venlafaxine + O-desmethylvenlafaxine: 195-400 ng/mL

Day(s) and Time(s) Performed

Monday, 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

Reject Due To

Hemolysis

Mild OK; Gross OK

Lipemia

Mild OK; Gross OK

Icterus

Mild OK; Gross OK

Other

Serum gel tube

Method Name

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

Secondary ID

83732