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) Diuretics (1) Drugs of Abuse (2) Drugs of Abuse, Therapeutics (1) Therapeutics (3) (-) Vasodilators (1) Test Sub-Category (-) Other (1) Test Test Name 4197U Sildenafil and Metabolite, Urine