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) (2) Sample Type Blood (3) Serum or Plasma (3) Tissue (1) (-) Urine (2) Test Area Therapeutics (2) Test Category Analgesics (1) Anesthetics (1) Anticholinergics (1) Antidepressants (1) Antiepileptics/Antiseizures (2) Antimigraines (1) Antipsychotics (3) Bronchodilators (1) Hallucinogens (1) Opiates/Opioids (1) Other (1) Pesticides/Insecticides (1) (-) Sedative/Hypnotics (2) Vasodilators (1) Volatiles (2) Test Sub-Category Benzodiazepines (1) Non-Benzodiazepines (1) (-) Other (2) Test Test Name 4086U Ramelteon and Metabolite, Urine 4815U Xylazine, Urine