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) (2) Sample Type (-) Blood (1) Serum or Plasma (1) (-) Urine (1) Test Area (-) Therapeutics (2) Test Category Analgesics (8) Anesthetics (3) Antidepressants (8) Antiepileptics/Antiseizures (5) Antihistamines (1) Antihypertensives (3) Antimicrobials (2) Antineoplastics (1) Antiparkinsons (2) Antipsychotics (9) Antirheumatics (1) Bronchodilators (2) Cholinesterase Inhibitors (1) Diuretics (1) Immunosuppressants (3) Muscle Relaxants (1) Sedative/Hypnotics (4) (-) Stimulants (2) Sympathomimetic Amines (2) Vasodilators (1) Test Sub-Category Alkaloids (2) Test Test Name 4380B Theobromine, Blood 4380U Theobromine, Urine