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 (2) Serum or Plasma (2) Urine (1) Test Area (-) Therapeutics (2) Test Category Antihypertensives (1) Antiparkinsons (1) Test Sub-Category Alkaloids (1) Alpha Blockers (1) Antibiotics (1) (-) Anticholinergics (1) Barbiturates (4) Benzodiazepines (2) Beta Blockers (1) (-) Diuretics (1) NSAIDs (1) Opiates/Opioids (3) Other (18) Phenothiazines (3) Tricyclic (3) Vasoconstrictors (1) Test Test Name 4540B Triamterene, Blood 4680B Trihexyphenidyl, Blood