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 Acids (1) Alcohols (1) Analgesics (5) Anesthetics (2) Antacids (1) Anticholinergics (1) Antidepressants (9) Antiepileptics/Antiseizures (4) Antihypertensives (5) Antimicrobials (2) Antimigraines (1) Antiparkinsons (1) Antipsychotics (7) Biomarkers (2) (-) Bronchodilators (1) Cholinesterase Inhibitors (1) Decongestants (1) Hallucinogens (1) Metals/Elements (17) NPS/Designer Drugs (1) Opiates/Opioids (1) Other (1) Pesticides/Insecticides (2) Sedative/Hypnotics (6) Solvents (3) Stimulants (2) Sympathomimetic Amines (1) Vasodilators (1) Volatiles (3) Test Sub-Category Other (1) Test Test Name 4387U Theophylline, Urine