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/Mass Spectrometry (GC/MS) (1) High Performance Liquid Chromatography/ Tandem Mass Spectrometry (LC-MS/MS) (1) Sample Type Blood (3) Serum or Plasma (5) (-) Urine (2) Test Area (-) Drugs of Abuse (1) Postmortem (1) (-) Therapeutics (1) Test Category Antiparkinsons (1) Drugs of Abuse (1) Test Sub-Category Anticholinergics (1) Other (1) Test Test Name 4680U Trihexyphenidyl, Urine 8098U Drug Screen (GC/MS), Urine