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 (2) Fluid (2) Serum or Plasma (5) Tissue (2) Urine (2) Test Area Therapeutics (2) Test Category Antidepressants (3) (-) Antiepileptics/Antiseizures (1) (-) Antihypertensives (1) Antimicrobials (1) Immunosuppressants (1) Metals/Elements (1) Vasodilators (1) Volatiles (1) Test Sub-Category Calcium Channel Blockers (1) Other (1) Test Test Name 4757B Valproic Acid, Blood 4770B Verapamil, Blood