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 (3) (-) Fluid (1) Serum or Plasma (1) Urine (3) Test Area (-) Therapeutics (1) Test Category (-) Antianxiety (1) Antiarrhythmics (1) Antihistamines (2) Cholinesterase Inhibitors (1) Test Sub-Category Other (1) Test Test Name 1810FL Doxepin and Metabolite, Fluid