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) (1) Sample Type Blood (5) (-) Fluid (1) Serum or Plasma (3) Urine (4) Test Area Therapeutics (1) Test Category (-) Antianxiety (1) Antiarrhythmics (1) Antihistamines (2) Cholinesterase Inhibitors (1) Drugs of Abuse (3) Drugs of Abuse, Therapeutics (2) Test Sub-Category Other (1) Test Test Name 1810FL Doxepin and Metabolite, Fluid