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 (1) (-) Serum or Plasma (2) Urine (1) Test Area Therapeutics (2) Test Category (-) Antihypertensives (2) Test Sub-Category Alpha-2 Adrenergic Agonists (2) (-) Alpha-2 Adrenergic Antagonists (1) Alpha Blockers (3) Beta Blockers (8) Calcium Channel Blockers (4) Diuretics (6) (-) Vasodilators (1) Test Test Name 2308SP Hydralazine, Serum/Plasma 4830SP Yohimbine, Serum/Plasma