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) (1) Sample Type Blood (4) Fluid (2) Serum or Plasma (8) Tissue (2) (-) Urine (2) Test Area Exposure (1) (-) Therapeutics (2) Test Category Antiepileptics/Antiseizures (1) Antihypertensives (1) Test Sub-Category (-) Calcium Channel Blockers (1) (-) Other (1) Serotonin-Norepinephrine Reuptake Inhibitors (SNRI) (2) Test Test Name 4757U Valproic Acid, Urine 4770U Verapamil, Urine