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 (4) Antiepileptics/Antiseizures (3) (-) Antihypertensives (2) Antimicrobials (3) Cholinesterase Inhibitors (2) Depressants (2) Expectorants (2) Metals/Elements (5) Sedative/Hypnotics (4) Solvents (2) Test Sub-Category Alpha-2 Adrenergic Agonists (2) Test Test Name 2186B Guanfacine, Blood 2186SP Guanfacine, Serum/Plasma