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) (2) Sample Type Blood (1) Fluid (1) Serum or Plasma (1) (-) Tissue (1) (-) Urine (1) Test Area Therapeutics (2) Test Category Analgesics (1) Antiarrhythmics (1) Anticholinergics (1) Antidepressants (2) (-) Antihistamines (2) Antihypertensives (1) Antitussives/Cough Suppressants (5) Diuretics (1) NPS/Designer Drugs (3) Potassium Channel Blockers (1) Test Sub-Category Other (2) Test Test Name 1760TI Diphenhydramine, Tissue 1760U Diphenhydramine, Urine