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 (2) (-) Urine (1) Test Area (-) Therapeutics (1) Test Category Analgesics (5) Anesthetics (2) Antacids (1) Anticholinergics (1) Antidepressants (4) Antiepileptics/Antiseizures (2) Antihypertensives (2) Antimicrobials (2) Antimigraines (1) Antiparkinsons (1) Antipsychotics (3) (-) Bronchodilators (1) Decongestants (1) Sedative/Hypnotics (4) Stimulants (2) Sympathomimetic Amines (1) Vasodilators (1) Test Sub-Category Other (1) Test Test Name 4387U Theophylline, Urine