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) Fluid (1) Serum or Plasma (2) (-) Urine (2) Test Area Therapeutics (2) Test Category Antihypertensives (1) Sedative/Hypnotics (1) Test Sub-Category Alkaloids (1) Benzodiazepines (1) (-) Beta Blockers (1) CNS Stimulants (2) (-) Hormones (1) Opiates/Opioids (4) Other (15) Serotonin-Norepinephrine Reuptake Inhibitors (SNRI) (1) Test Test Name 2604U Melatonin, Urine 3043U Metoprolol, Urine