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) (1) Sample Type Serum or Plasma (1) Test Area Therapeutics (1) Test Category Antacids (5) Antiarrhythmics (6) Antidepressants (3) Antigout Agents (1) Antileprosy Agents (2) Antiparkinsons (1) Antipsychotics (4) Antithrombotics (4) Antithyroids (2) Antitussives/Cough Suppressants (3) Biomarkers (7) (-) Dopamine Precursor (1) Drugs of Abuse (2) Psychoactives (2) Volatiles (2) Test Sub-Category Parkinsons (1) Test Test Name 2504SP Levodopa, Serum/Plasma