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 (3) (-) Fluid (1) Serum or Plasma (3) Urine (3) Test Area (-) Therapeutics (1) Test Category Antihypertensives (1) Test Sub-Category Benzodiazepines (1) (-) Beta Blockers (1) Opiates/Opioids (2) Other (2) Test Test Name 3043FL Metoprolol, Fluid