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 Antiparkinsons (2) Test Sub-Category (-) Anticholinergics (2) Barbiturates (3) Opiates/Opioids (1) Organochlorides (2) Other (15) Phenothiazines (3) Sedative-Hypnotics (1) Tricyclic (2) Test Test Name 4680B Trihexyphenidyl, Blood 4680U Trihexyphenidyl, Urine