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) (-) High Performance Liquid Chromatography/ Tandem Mass Spectrometry (LC-MS/MS) (1) Sample Type Blood (2) Fluid (2) Serum or Plasma (2) Tissue (1) (-) Urine (1) Test Area Therapeutics (1) Test Category Analgesics (1) Anticholinergics (1) Antidepressants (2) (-) Antihistamines (1) Antihypertensives (1) Antitussives/Cough Suppressants (4) Diuretics (1) NPS/Designer Drugs (3) Potassium Channel Blockers (1) Test Sub-Category Other (1) Test Test Name 1760U Diphenhydramine, Urine