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 Acids (5) Alcohols (10) Analgesics (27) Anesthetics (9) Antianxiety (7) Antiarrhythmics (3) Anticholinergics (3) Antidepressants (15) Antidiabetics (8) Antidiarrheals (2) Antiemetics (2) Antiepileptics/Antiseizures (27) Antihistamines (10) Antihypertensives (14) Antimicrobials (23) Antineoplastics (1) Antipsychotics (13) Antithyroids (2) Antitussives/Cough Suppressants (7) Biomarkers (5) Carbonic Anhydrase Inhibitors (1) Cholinesterase Inhibitors (2) Depressants (1) Diuretics (1) (-) Dopamine Precursor (1) Emetics (4) Expectorants (3) Gases (1) Herbicides (3) Hydrocarbons (1) Immunosuppressants (5) Laxatives (1) Metals/Elements (84) Mood Stabilizers (6) Muscle Relaxants (11) NMDA Antagonists (2) Other (1) Pesticides/Insecticides (7) Retinoids (2) Sedative/Hypnotics (23) Solvents (20) Stimulants (3) Volatiles (30) Test Sub-Category Parkinsons (1) Test Test Name 2504SP Levodopa, Serum/Plasma