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 Antidiabetics (3) Antiepileptics/Antiseizures (3) (-) Antihypertensives (2) Antimicrobials (3) Cholinesterase Inhibitors (1) Expectorants (2) Test Sub-Category Alpha-2 Adrenergic Agonists (2) Test Test Name 2186SP Guanfacine, Serum/Plasma 2186U Guanfacine, Urine