Test Catalog Search Home Test Catalog Search Testing Choices: From the standard to the extraordinary × Search Clear Filter by: Clear all Method(s) High Performance Liquid Chromatography/Tandem Mass Spectrometry (LC-MS/MS) (2) Sample Type (-) Serum or Plasma (2) Test Area Drugs of Abuse (1) Postmortem (1) (-) Therapeutics (2) Test Category Antiparkinsons (1) Dopamine Precursor (1) Test Sub-Category Anticholinergics (1) Dopamine Antagonists (1) (-) Other (1) (-) Parkinsons (1) Your search has returned no tests.