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 Acids (2) Analgesics (1) Anesthetics (2) Antidepressants (2) Antiepileptics/Antiseizures (2) Antihistamines (1) (-) Antiparkinsons (2) Antipsychotics (7) Depressants (1) Other (1) Sedative/Hypnotics (1) Solvents (1) Terpenes (2) Volatiles (4) Test Sub-Category Anticholinergics (2) Test Test Name 4680B Trihexyphenidyl, Blood 4680U Trihexyphenidyl, Urine