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) (3) (-) 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 (3) Antiarrhythmics (2) Anticholinergics (2) Antidepressants (5) Antiemetics (1) (-) Antihistamines (2) Antihypertensives (3) Antithrombotics (4) Antitussives/Cough Suppressants (7) Cholinesterase Inhibitors (1) Diuretics (3) Drugs of Abuse (5) Drugs of Abuse, Therapeutics (3) NPS/Designer Drugs (6) Pesticides/Insecticides (1) Potassium Channel Blockers (2) Vasodilators (1) Test Sub-Category Other (2) Test Test Name 1760SP Diphenhydramine, Serum/Plasma 1760U Diphenhydramine, Urine