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) (1) High Performance Liquid Chromatography/ Tandem Mass Spectrometry (LC-MS/MS) (4) Sample Type (-) Blood (1) Serum or Plasma (2) Urine (1) Test Area Therapeutics (1) Test Category Analgesics (1) Test Sub-Category Antiarrhythmics (1) Barbiturates (1) Insecticides (2) (-) Opiates/Opioids (1) Other (19) Tetracyclics (1) Tricyclic (1) Test Test Name 2610B Meperidine and Metabolite, Blood