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 (15) Antacids (1) Antianxiety (2) Antiepileptics/Antiseizures (1) Antipsychotics (1) (-) Antispasmodics (2) Muscle Relaxants (2) Test Sub-Category Antispasmodics (2) Test Test Name 3266SP Oxybutynin, Serum/Plasma 3266U Oxybutynin, Urine