Test Catalog Search Home Test Catalog Search Testing Choices: From the standard to the extraordinary × Search Clear Filter by: Clear all Method(s) Headspace Gas Chromatography (GC) (1) (-) High Performance Liquid Chromatography/ Tandem Mass Spectrometry (LC-MS/MS) (2) Sample Type (-) Blood (1) Serum or Plasma (1) (-) Tissue (1) Urine (2) Test Area Therapeutics (2) Test Category Sedative/Hypnotics (2) Test Sub-Category Other (2) Test Test Name 4815B Xylazine, Blood 4815TI Xylazine, Tissue