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) Fluid (1) Serum or Plasma (1) (-) Urine (1) Test Area (-) Therapeutics (2) Test Category Antihypertensives (2) Test Sub-Category Antibiotics (1) Antihistamines (1) Antimalarials (1) Barbiturates (2) Benzodiazepines (2) (-) Beta Blockers (2) CNS Stimulants (3) Diuretics (1) Dopamine Antagonists (2) Hormones (2) Opiates/Opioids (17) Other (22) Serotonin-Norepinephrine Reuptake Inhibitors (SNRI) (2) Tetracyclics (4) Test Test Name 3043B Metoprolol, Blood 3043U Metoprolol, Urine