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 Therapeutics (2) Test Category (-) Antiparkinsons (1) (-) Dopamine Precursor (1) Drugs of Abuse (3) Therapeutics (5) Test Sub-Category Anticholinergics (3) Dopamine Antagonists (2) (-) Other (1) (-) Parkinsons (1) Test Test Name 2504SP Levodopa, Serum/Plasma 4205SP Sinemet®, Serum/Plasma