Test Catalog Search Home Test Catalog Search Testing Choices: From the standard to the extraordinary × Search Clear Filter by: Clear all Method(s) (-) High Performance Liquid Chromatography/ Tandem Mass Spectrometry (LC-MS/MS) (2) Sample Type Blood (1) Fluid (1) Serum or Plasma (4) (-) Tissue (1) (-) Urine (1) Test Area Therapeutics (2) Test Category Antidepressants (3) (-) Antiepileptics/Antiseizures (2) Volatiles (1) Test Sub-Category Other (2) Test Test Name 4757TI Valproic Acid, Tissue 4757U Valproic Acid, Urine