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 (5) Fluid (2) Serum or Plasma (10) (-) Tissue (1) Urine (2) Test Area Therapeutics (1) Test Category Antidepressants (3) (-) Antiepileptics/Antiseizures (1) Antihypertensives (1) Antipsychotics (2) Pesticides/Insecticides (1) Sedative/Hypnotics (1) Test Sub-Category Other (1) Test Test Name 4757TI Valproic Acid, Tissue