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 (GC) (2) High Performance Liquid Chromatography/ Tandem Mass Spectrometry (LC-MS/MS) (4) Sample Type (-) Blood (1) Fluid (1) Serum or Plasma (1) (-) Urine (1) Test Area Therapeutics (2) Test Category Anesthetics (1) (-) Antianxiety (2) Antidepressants (5) Antihistamines (2) Antipsychotics (2) Depressants (1) Industrial/Environmental Toxins (1) Other (1) Pesticides/Insecticides (6) Sedative/Hypnotics (4) Solvents (10) Stimulants (2) Volatiles (6) Test Sub-Category Other (2) Test Test Name 1810B Doxepin and Metabolite, Blood 1810U Doxepin and Metabolite, Urine