Test Catalog Search Home Test Catalog Search Testing Choices: From the standard to the extraordinary × Search Clear Filter by: Clear all Method(s) (-) Gas Chromatography (GC) (1) High Performance Liquid Chromatography/ Tandem Mass Spectrometry (LC-MS/MS) (12) Sample Type Blood (1) Fluid (1) Serum or Plasma (2) Tissue (1) (-) Urine (1) Test Area (-) Therapeutics (1) Test Category Antihypertensives (1) Test Sub-Category Calcium Channel Blockers (1) Test Test Name 4770U Verapamil, Urine