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 (5) Fluid (1) Serum or Plasma (5) Tissue (1) (-) Urine (3) Test Area Therapeutics (3) Test Category Antihypertensives (3) Test Sub-Category Alpha-2 Adrenergic Agonists (2) (-) Alpha-2 Adrenergic Antagonists (1) Beta Blockers (5) (-) Calcium Channel Blockers (2) Diuretics (2) Drug Facilitated Sexual Assault (1) Other (8) Test Test Name 1640U Diltiazem, Urine 4770U Verapamil, Urine 4830U Yohimbine, Urine