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| 92220:VENLAFAXINE (EFFEXOR®) LEVEL | |||||||||
| Alias Names: | Desmethylvenla faxine | ||||||||
| Methodology: | High Performance Liquid Chromatography with Ultraviolet Detection (HPLC-UV) | ||||||||
| Edit Date: | 2/8/2010 | ||||||||
| Performed: | Daily | ||||||||
| Released: | 24-48 hours after setup at PeaceHealth Laboratories’ reference lab | ||||||||
| CPT Code: | 82492-90 | ||||||||
| Specimen Collection Details | |||||||||
| Collection: | One 5 mL red top tube. Do not use serum separator tube (SST). NOTE: Trough levels are most reproducible. | ||||||||
| Handling: | Allow to clot, centrifuge and separate serum into a plastic vial. | ||||||||
| Stability: | 72 hours ambient. Refrigerate or freeze for longer storage. | ||||||||
| Standard Volume: | 3 mL serum | ||||||||
| Minimum Volume: | 0.6 mL serum | ||||||||
| Transport: | Refrigerated. | ||||||||
| Rejection Criteria: | Use of SST. | ||||||||
| Reference Range: | |||||||||||||||||||
| Report Limit: 10 ng/mL
Reference ranges for venlafaxine and desmethylvenlafaxine have not been established. Expected concentrations for venlafaxine are 100-500 ng/mL with desmethylvenlafaxine concentrations of 200-400 ng/mL. Toxic concentrations have not been established. |
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