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) (1) Sample Type Blood (1) Serum or Plasma (1) (-) Urine (1) Test Area Therapeutics (1) Test Category Antiepileptics/Antiseizures (1) (-) Antihypertensives (1) Antimicrobials (1) Depressants (1) Expectorants (1) Metals/Elements (3) Solvents (1) Test Sub-Category Alpha-2 Adrenergic Agonists (1) Test Test Name 2186U Guanfacine, Urine