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) (1) Sample Type Blood (2) Fluid (1) Serum or Plasma (2) (-) Tissue (1) Urine (2) Test Area Therapeutics (1) Test Category Antidepressants (1) (-) Antihypertensives (1) Test Sub-Category Calcium Channel Blockers (1) Test Test Name 4770TI Verapamil, Tissue