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 (2) Serum or Plasma (3) (-) Urine (1) Test Area (-) Therapeutics (1) Test Category Analgesics (45) Anesthetics (7) Antacids (3) Antianxiety (11) Antiarrhythmics (2) Anticholinergics (9) Antidepressants (36) Antidiabetics (1) Antiepileptics/Antiseizures (15) Antihistamines (9) Antihypertensives (11) Antimicrobials (8) Antimigraines (1) (-) Antiparkinsons (1) Antipsychotics (12) Antispasmodics (1) Antitussives/Cough Suppressants (5) Appetite Suppressants (1) Bronchodilators (1) Cholinesterase Inhibitors (1) Decongestants (4) Depressants (2) Diagnostic Aids (1) Diuretics (1) Expectorants (1) Immunosuppressants (1) Laxatives (1) Mood Stabilizers (1) Muscle Relaxants (5) Opiate/Opioid Antagonists (3) Potassium Channel Blockers (1) Sedative/Hypnotics (25) Stimulants (11) Sympathomimetic Amines (1) Vasodilators (1) Test Sub-Category Anticholinergics (1) Test Test Name 4680U Trihexyphenidyl, Urine