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 Antihypertensives (1) Test Sub-Category (-) Alpha-2 Adrenergic Agonists (1) Amphetamines (1) Antiarrhythmics (1) Antimalarials (1) Antiparasitics (1) Antivirals (1) Barbiturates (1) Benzodiazepines (2) Diuretics (2) GABA Analogues (1) Hormones (1) Metals/Elements (1) Non-Benzodiazepines (1) NSAIDs (2) Opiates/Opioids (2) Other (18) Selective Serotonin Reuptake Inhibitors (SSRI) (2) Tetracyclics (1) Tricyclic (1) Test Test Name 2186U Guanfacine, Urine