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 Antiarrhythmics (1) (-) Antihypertensives (2) Metals/Elements (1) Test Sub-Category Alpha Blockers (1) (-) Beta Blockers (2) Calcium Channel Blockers (1) Diuretics (1) Test Test Name 3043B Metoprolol, Blood 3103B Nadolol, Blood