Test Catalog Search Home Test Catalog Search Testing Choices: From the standard to the extraordinary × Search Clear Filter by: Clear all Method(s) Gas Chromatography (GC) (1) (-) High Performance Liquid Chromatography/ Tandem Mass Spectrometry (LC-MS/MS) (2) Sample Type Blood (7) Fluid (2) Serum or Plasma (11) (-) Tissue (2) Urine (4) Test Area Therapeutics (2) Test Category Antidepressants (1) Antiepileptics/Antiseizures (1) Test Sub-Category Other (1) Serotonin-Norepinephrine Reuptake Inhibitors (SNRI) (1) Test Test Name 4757TI Valproic Acid, Tissue 4767TI Venlafaxine and Metabolite, Tissue