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 Anesthetics (9) Antianxiety (4) Antidiarrheals (2) Antiepileptics/Antiseizures (9) Antihistamines (5) Antihypertensives (3) Antimicrobials (3) Antipsychotics (5) (-) Dopamine Precursor (1) Immunosuppressants (4) Laxatives (1) Mood Stabilizers (6) Stimulants (3) Test Sub-Category Parkinsons (1) Test Test Name 2504SP Levodopa, Serum/Plasma