Test Catalog Search Home Test Catalog Search Testing Choices: From the standard to the extraordinary × Search Clear Filter by: Clear all Method(s) Enzyme-Linked Immunosorbent Assay (ELISA) (1) (-) Gas Chromatography (GC) (1) Gas Chromatography/Mass Spectrometry (GC/MS) (1) High Performance Liquid Chromatography/Time of Flight-Mass Spectrometry (LC/TOF-MS) (1) Sample Type Blood (2) Fluid (1) (-) Serum or Plasma (1) Urine (2) Test Area Therapeutics (1) Test Category (-) Antianxiety (1) Antidepressants (2) Test Sub-Category (-) Other (1) Test Test Name 1810SP Doxepin and Metabolite, Serum/Plasma