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 Antihypertensives (1) Test Sub-Category Alpha Blockers (1) Anticoagulants (4) Benzodiazepines (2) (-) Calcium Channel Blockers (1) Cannabinoids (1) Cardiac Glycosides (2) Designer Benzodiazepines (1) Herbicides (1) NSAIDs (1) Opiates/Opioids (2) Other (10) Serotonin-Norepinephrine Reuptake Inhibitors (SNRI) (2) Thiazides (1) Test Test Name 1640SP Diltiazem, Serum/Plasma