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) Inductively Coupled Plasma/Mass Spectrometry (ICP/MS) (1) Sample Type Blood (2) Fluid (1) Hair (1) RBCs (1) Serum or Plasma (2) Stool (1) (-) Urine (2) Test Area Exposure (1) Therapeutics (1) Test Category Antihypertensives (1) Metals/Elements (1) Test Sub-Category (-) Alpha-2 Adrenergic Agonists (1) Amphetamines (1) Antiarrhythmics (1) Antimalarials (1) Antiparasitics (1) Antivirals (1) Barbiturates (1) Benzodiazepines (3) Biomarkers (1) Carboxylic Acids (3) Diuretics (2) GABA Analogues (1) Hormones (1) (-) Macrominerals (1) Metals/Elements (1) Non-Benzodiazepines (1) NSAIDs (2) Opiates/Opioids (3) Other (54) Selective Serotonin Reuptake Inhibitors (SSRI) (2) Synthetic Cathinone (1) Tetracyclics (1) Toxic Elements (4) Trace Elements (3) Tricyclic (1) Test Test Name 2186U Guanfacine, Urine 2551U Magnesium - Total, Urine