Test Catalog Search Home Test Catalog Search Testing Choices: From the standard to the extraordinary × Search Clear Filter by: Clear all Method(s) 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 (-) Antihypertensives (2) Test Sub-Category (-) Alpha-2 Adrenergic Antagonists (1) (-) Beta Blockers (1) Calcium Channel Blockers (1) Test Test Name 4000U Propranolol, Urine 4830U Yohimbine, Urine