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/Mass Spectrometry (GC/MS) (1) High Performance Liquid Chromatography/ Tandem Mass Spectrometry (LC-MS/MS) (1) Sample Type (-) Blood (1) (-) Serum or Plasma (1) Tissue (1) Test Area Therapeutics (2) Test Category Analgesics (7) (-) Anesthetics (1) Antianxiety (2) Antidepressants (6) Antidiabetics (2) Antihypertensives (4) Industrial/Environmental Toxins (2) Metals/Elements (2) NPS/Designer Drugs (8) Opiate/Opioid Antagonists (4) (-) Other (1) Sedative/Hypnotics (4) Stimulants (4) Therapeutics (1) Vasodilators (2) Test Sub-Category Other (2) Test Test Name 3214B Nitrous Oxide, Blood 3225SP Nuedexta®, Serum/Plasma