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) (2) Sample Type (-) Blood (1) Serum or Plasma (1) (-) Urine (1) Test Area Therapeutics (2) Test Category Analgesics (16) Antacids (1) Antianxiety (2) Antiepileptics/Antiseizures (1) Antipsychotics (1) (-) Antispasmodics (2) Industrial/Environmental Toxins (1) Muscle Relaxants (3) Other (2) Pesticides/Insecticides (1) Test Sub-Category Antispasmodics (2) Test Test Name 3266B Oxybutynin, Blood 3266U Oxybutynin, Urine