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) (2) Sample Type (-) Blood (1) (-) Serum or Plasma (1) Urine (1) Test Area Therapeutics (2) Test Category Antihypertensives (2) Test Sub-Category Alpha-2 Adrenergic Agonists (2) Alpha/Beta Adrenergic Agonists (2) Alpha Blockers (2) Antibiotics (2) Antihistamines (3) Antimalarials (1) Benzodiazepines (10) (-) Calcium Channel Blockers (2) Cannabinoids (2) Cardiac Glycosides (2) Cocaine (4) Designer Benzodiazepines (4) Diuretics (2) Herbicides (2) NSAIDs (4) Opiates/Opioids (2) Other (33) Selective Serotonin Reuptake Inhibitors (SSRI) (4) Serotonin-Norepinephrine Reuptake Inhibitors (SNRI) (2) Stimulants (2) Sulfonylureas (1) Synthetic Cathinone (2) Thiazides (2) Test Test Name 1640B Diltiazem, Blood 1640SP Diltiazem, Serum/Plasma