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) (1) Sample Type (-) Blood (1) Fluid (1) Serum or Plasma (4) Tissue (1) Urine (1) Test Area (-) Therapeutics (1) Test Category Antidepressants (3) (-) Antiepileptics/Antiseizures (1) Antihypertensives (1) Antimicrobials (1) Immunosuppressants (1) Vasodilators (1) Test Sub-Category Other (1) Test Test Name 4757B Valproic Acid, Blood