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 (4) Fluid (1) Serum or Plasma (4) (-) Tissue (1) (-) Urine (2) Test Area Therapeutics (3) Test Category Antihypertensives (3) Test Sub-Category Alpha-2 Adrenergic Agonists (2) Alpha-2 Adrenergic Antagonists (1) Beta Blockers (7) (-) Calcium Channel Blockers (3) Diuretics (2) Drug Facilitated Sexual Assault (1) Other (11) Test Test Name 1640U Diltiazem, Urine 4770TI Verapamil, Tissue 4770U Verapamil, Urine