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 (-) Blood (1) Serum or Plasma (1) Urine (1) Test Area (-) Therapeutics (1) Test Category Analgesics (12) Anesthetics (4) Antianxiety (3) Antiarrhythmics (1) Anticholinergics (1) Antidepressants (6) Antidiabetics (3) Antidiarrheals (1) Antiemetics (1) Antiepileptics/Antiseizures (11) Antihistamines (5) Antihypertensives (5) Antimicrobials (8) Antineoplastics (1) Antipsychotics (5) Antithyroids (1) Antitussives/Cough Suppressants (2) Cholinesterase Inhibitors (1) (-) Expectorants (1) Immunosuppressants (3) Mood Stabilizers (2) Muscle Relaxants (5) NMDA Antagonists (1) Sedative/Hypnotics (9) Stimulants (1) Test Sub-Category Other (1) Test Test Name 2185B Guaifenesin, Blood