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 (6) Serum or Plasma (5) (-) Tissue (2) Urine (1) Test Area (-) Therapeutics (2) Test Category Analgesics (1) (-) Anesthetics (1) Antidepressants (2) Antiepileptics/Antiseizures (1) (-) Antihistamines (1) Antipsychotics (1) Stimulants (1) Test Sub-Category Other (2) Test Test Name 3214TI Nitrous Oxide, Tissue 3970TI Promethazine, Tissue