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 (2) (-) Urine (1) Test Area Therapeutics (2) Test Category Analgesics (10) Anesthetics (3) Antacids (2) Antiarrhythmics (2) Anticholinergics (2) Antidepressants (10) Antidiabetics (2) Antiepileptics/Antiseizures (7) Antihistamines (1) Antihypertensives (7) Antimicrobials (5) Antimigraines (2) Antineoplastics (1) Antiparkinsons (3) Antipsychotics (8) Antirheumatics (1) (-) Bronchodilators (2) Cholinesterase Inhibitors (1) Decongestants (2) Diuretics (2) Hallucinogens (2) Hypoglycemic Agents (1) Immunosuppressants (5) Muscle Relaxants (1) NPS/Designer Drugs (2) Opiates/Opioids (2) Other (1) Pesticides/Insecticides (2) Sedative/Hypnotics (10) Stimulants (4) Sympathomimetic Amines (2) Vasodilators (4) Volatiles (2) Test Sub-Category Other (2) Test Test Name 4387B Theophylline, Blood 4387U Theophylline, Urine