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 (1) (-) Serum or Plasma (2) Tissue (1) Urine (1) Test Area Therapeutics (2) Test Category Analgesics (1) (-) Antihypertensives (2) Test Sub-Category Alpha-2 Adrenergic Antagonists (1) Alpha Blockers (1) Beta Blockers (2) (-) Calcium Channel Blockers (1) (-) Diuretics (1) Test Test Name 4540SP Triamterene, Serum/Plasma 4770SP Verapamil, Serum/Plasma