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 (2) Serum or Plasma (2) (-) Urine (2) Test Area Therapeutics (2) 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) Other (1) Test Test Name 2185U Guaifenesin, Urine 2186U Guanfacine, Urine