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HelpTest Code VENLA Venlafaxine, Serum
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.
Useful For
Monitoring serum concentration during therapy
Evaluating potential toxicity
Evaluating patient compliance
Method Name
Liquid Chromatography-Tandem Mass Spectrometry (LC-MS/MS)
Reporting Name
Venlafaxine, SSpecimen Type
Serum RedSpecimen 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: 100-400 ng/mL
Day(s) Performed
Thursday
Report Available
1 to 4 daysPerforming Laboratory
Mayo Clinic Laboratories in Rochester
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 |
Forms
If not ordering electronically, complete, print, and send a Therapeutics Test Request (T831) with the specimen.