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) (2) High Performance Liquid Chromatography/ Tandem Mass Spectrometry (LC-MS/MS) (2) Sample Type Blood (1) Fluid (1) (-) Serum or Plasma (1) Tissue (1) (-) Urine (1) Test Area Therapeutics (2) Test Category (-) Antihypertensives (2) Test Sub-Category Calcium Channel Blockers (2) Test Test Name 4770SP Verapamil, Serum/Plasma 4770U Verapamil, Urine