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) (2) Sample Type Blood (3) Fluid (1) Serum or Plasma (3) Tissue (1) (-) Urine (2) Test Area Therapeutics (2) Test Category Analgesics (1) Anticholinergics (1) Antidepressants (2) (-) Antihistamines (1) (-) Antihypertensives (1) Antitussives/Cough Suppressants (4) Diuretics (1) Drugs of Abuse (2) NPS/Designer Drugs (3) Potassium Channel Blockers (1) Test Sub-Category Calcium Channel Blockers (1) Other (1) Test Test Name 1640U Diltiazem, Urine 1760U Diphenhydramine, Urine