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) 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) Other (3) Serotonin-Norepinephrine Reuptake Inhibitors (SNRI) (3) Toxic Elements (2) Test Test Name 4770TI Verapamil, Tissue 4770U Verapamil, Urine