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 (1) Serum or Plasma (1) (-) Urine (1) Test Area Therapeutics (2) Test Category Antihypertensives (2) Test Sub-Category (-) Alpha-2 Adrenergic Agonists (2) Antivirals (2) GABA Analogues (2) Other (3) Sulfonylureas (1) Test Test Name 2186B Guanfacine, Blood 2186U Guanfacine, Urine