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) (3) Sample Type (-) Blood (3) Serum or Plasma (3) Test Area (-) Therapeutics (3) Test Category Antihypertensives (3) Test Sub-Category Alpha-2 Adrenergic Agonists (2) Alpha-2 Adrenergic Antagonists (1) (-) Alpha Blockers (3) Beta Blockers (9) Calcium Channel Blockers (4) Diuretics (5) Other (5) Thiazides (1) Test Test Name 1815B Doxazosin, Blood 3788B Prazosin, Blood 4329B Terazosin, Blood