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 Drugs of Abuse (4) Exposure (13) (-) Therapeutics (1) Test Category 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) Carbonic Anhydrase Inhibitors (1) Cholinesterase Inhibitors (2) Depressants (1) Diuretics (1) (-) Dopamine Precursor (1) Expectorants (3) Immunosuppressants (5) Laxatives (1) Mood Stabilizers (6) Muscle Relaxants (11) NMDA Antagonists (2) Other (1) Retinoids (2) Sedative/Hypnotics (23) Stimulants (3) Test Sub-Category Parkinsons (1) Test Test Name 2504SP Levodopa, Serum/Plasma