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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

Method Name

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

Performing Laboratory

Mayo Clinic Laboratories in Rochester

Specimen Type

Serum Red


Specimen Required


Collection Container/Tube: Red top (serum gel/SST are not acceptable)

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, and then collect specimen the following morning prior to next dose.

3. Centrifuge and aliquot serum into a plastic vial 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) Performed

Thursday

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 US 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

Report Available

1 to 4 days

Forms

If not ordering electronically, complete, print, and send a Therapeutics Test Request (T831) with the specimen.