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 (-) Dopamine Precursor (1) Test Sub-Category Antibiotics (1) Antifungals (9) Antimalarials (7) Antiparasitics (3) Antivirals (3) (-) Parkinsons (1) Selective Serotonin Reuptake Inhibitors (SSRI) (9) Tetracyclics (3) Tricyclic (3) Test Test Name 2504SP Levodopa, Serum/Plasma