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 (3) Fluid (2) Hair (1) Serum or Plasma (2) Tissue (2) (-) Urine (1) Test Area Therapeutics (1) Test Category Analgesics (1) Test Sub-Category Benzodiazepines (3) Carboxylic Acids (1) Diuretics (1) (-) Opiates/Opioids (1) Other (2) Selective Serotonin Reuptake Inhibitors (SSRI) (3) Trace Elements (1) Test Test Name 2079U Fentanyl and Metabolite, Urine