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) (8) (-) High Performance Liquid Chromatography/Tandem Mass Spectrometry (LC-MS/MS) (1) (-) Immunoassay (IA) (1) Sample Type Serum or Plasma (2) Test Area Therapeutics (2) Test Category (-) Anesthetics (1) Antiarrhythmics (3) Antipsychotics (3) Antithyroids (2) (-) Dopamine Precursor (1) Test Sub-Category Antiarrhythmics (1) Parkinsons (1) Test Test Name 2504SP Levodopa, Serum/Plasma 2511SP Lidocaine, Serum/Plasma