Test Catalog Search Home Test Catalog Search Testing Choices: From the standard to the extraordinary × Search Clear Filter by: Clear all Method(s) Colorimetry (C) (1) Gas Chromatography (GC) (2) (-) High Performance Liquid Chromatography/ Tandem Mass Spectrometry (LC-MS/MS) (2) Sample Type Blood (3) Fluid (1) Serum or Plasma (3) Tissue (1) (-) Urine (2) Test Area Exposure (1) Therapeutics (1) Test Category Antispasmodics (1) Industrial/Environmental Toxins (1) Test Sub-Category (-) Antispasmodics (1) Benzodiazepines (1) Opiates/Opioids (5) (-) Other (1) Test Test Name 1355U o-Toluidine, Urine 3266U Oxybutynin and Metabolite, Urine