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) (1) Sample Type Blood (1) Fluid (1) (-) Serum or Plasma (1) Tissue (1) Urine (1) Test Area Therapeutics (1) Test Category Analgesics (2) Antiarrhythmics (2) Anticholinergics (1) Antidepressants (3) Antiemetics (1) (-) Antihistamines (1) Antihypertensives (2) Antithrombotics (3) Antitussives/Cough Suppressants (3) Cholinesterase Inhibitors (1) Diuretics (2) NPS/Designer Drugs (3) Pesticides/Insecticides (1) Potassium Channel Blockers (1) Vasodilators (1) Test Sub-Category Other (1) Test Test Name 1760SP Diphenhydramine, Serum/Plasma