Test Catalog Search Home Test Catalog Search Testing Choices: From the standard to the extraordinary × Search Clear Filter by: Clear all Method(s) (-) Gas Chromatography (GC) and Gas Chromatography/Mass Spectrometry (GC/MS) (1) High Performance Liquid Chromatography/ Tandem Mass Spectrometry (LC-MS/MS) (14) Sample Type Blood (2) Serum or Plasma (1) (-) Urine (1) Test Area Therapeutics (1) Test Category Analgesics (1) Test Sub-Category Alcohols (1) Drug Facilitated Sexual Assault (1) (-) Opiates/Opioids (1) Other (8) Tricyclic (3) Test Test Name 8721U Meperidine and Metabolite, Urine