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) (2) Sample Type Blood (1) Serum or Plasma (1) (-) Urine (2) Test Area Exposure (1) Therapeutics (1) Test Category Analgesics (6) Antianxiety (1) (-) Antispasmodics (1) (-) Industrial/Environmental Toxins (1) Muscle Relaxants (1) Other (1) Test Sub-Category Antispasmodics (1) Other (1) Test Test Name 1355U o-Toluidine, Urine 3266U Oxybutynin and Metabolite, Urine