Test Catalog Search Home Test Catalog Search Testing Choices: From the standard to the extraordinary × Search Clear Filter by: Clear all Method(s) Colorimetry (C) (7) Enzyme-Linked Immunosorbent Assay (ELISA) (7) (-) Gas Chromatography (GC) (2) Gas Chromatography/Mass Spectrometry (GC/MS) (7) Headspace Gas Chromatography (GC) (4) High Performance Liquid Chromatography/ Tandem Mass Spectrometry (LC-MS/MS) (5) Sample Type Blood (1) (-) Fluid (1) Serum or Plasma (2) (-) Tissue (1) Urine (1) Test Area Therapeutics (2) Test Category Antihypertensives (2) Test Sub-Category Calcium Channel Blockers (2) Test Test Name 4770FL Verapamil, Fluid 4770TI Verapamil, Tissue