Test Catalog Search Home Test Catalog Search Testing Choices: From the standard to the extraordinary × Search Clear Filter by: Clear all Method(s) Enzyme-Linked Immunosorbent Assay (ELISA) (5) Enzyme Immunoassay (EIA) (5) Gas Chromatography/Mass Spectrometry (GC/MS) (3) Headspace Gas Chromatography (GC) (3) (-) High Performance Liquid Chromatography/ Tandem Mass Spectrometry (LC-MS/MS) (2) High Performance Liquid Chromatography/Time of Flight-Mass Spectrometry (LC/TOF-MS) (4) Sample Type Blood (5) Serum or Plasma (7) (-) Urine (2) Test Area Drugs of Abuse (1) Therapeutics (1) Test Category Diuretics (1) Vasodilators (1) Test Sub-Category Alpha-2 Adrenergic Agonists (2) Alpha-2 Adrenergic Antagonists (1) Beta Blockers (5) Calcium Channel Blockers (1) Diuretics (2) (-) Other (2) Test Test Name 4197U Sildenafil and Metabolite, Urine 9318U Diuretics Screen, Urine