Test Catalog Search Home Test Catalog Search Testing Choices: From the standard to the extraordinary × Search Clear Filter by: Clear all Method(s) Colorimetry (C) (1) Enzyme-Linked Immunosorbent Assay (ELISA) (5) (-) Gas Chromatography (GC) (2) Gas Chromatography/Mass Spectrometry (GC/MS) (1) Headspace Gas Chromatography (GC) (3) High Performance Liquid Chromatography/ Tandem Mass Spectrometry (LC-MS/MS) (3) Sample Type Blood (17) Fat (1) (-) Fluid (2) Serum or Plasma (14) Tissue (1) Urine (10) Test Area Therapeutics (2) Test Category Antianxiety (1) Antihistamines (1) Test Sub-Category Other (2) Test Test Name 1810FL Doxepin and Metabolite, Fluid 1817FL Doxylamine, Fluid