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 (1) (-) Tissue (1) Urine (1) Test Area Therapeutics (2) Test Category Antiepileptics/Antiseizures (2) Test Sub-Category Other (2) Test Test Name 4757SP Valproic Acid, Serum/Plasma 4757TI Valproic Acid, Tissue