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 Blockers (2) Anticoagulants (1) Antiplatelet Agents (2) Appetite Suppressants (2) Benzodiazepines (2) Biomarkers (1) (-) Calcium Channel Blockers (2) Cannabinoids (1) Cardiac Glycosides (3) NSAIDs (2) Opiates/Opioids (2) Other (31) Serotonin-Norepinephrine Reuptake Inhibitors (SNRI) (4) Thiazides (2) Tricyclic (4) Test Test Name 1640B Diltiazem, Blood 1640SP Diltiazem, Serum/Plasma