Test Catalog Search Home Test Catalog Search Testing Choices: From the standard to the extraordinary × Search Clear Filter by: Clear all Method(s) High Performance Liquid Chromatography/ Tandem Mass Spectrometry (LC-MS/MS) (1) Sample Type Blood (1) Serum or Plasma (1) (-) Urine (1) Test Area Therapeutics (1) Test Category Antianxiety (1) Anticholinergics (1) Antihistamines (5) (-) Antihypertensives (1) Antipsychotics (1) Biomarkers (1) Drugs of Abuse (5) Industrial/Environmental Toxins (3) Muscle Relaxants (2) Other (1) Sedative/Hypnotics (2) Solvents (4) Volatiles (2) Test Sub-Category Alpha-2 Adrenergic Agonists (1) (-) Calcium Channel Blockers (1) Test Test Name 1640U Diltiazem, Urine