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 (7) Antidepressants (4) Antiepileptics/Antiseizures (3) Antihypertensives (3) (-) Antimicrobials (2) Antineoplastics (1) Antipsychotics (1) Antirheumatics (1) Bronchodilators (2) Cholinesterase Inhibitors (1) Diuretics (1) Immunosuppressants (3) Muscle Relaxants (1) Sedative/Hypnotics (3) Stimulants (2) Sympathomimetic Amines (2) Vasodilators (1) Test Sub-Category Antibiotics (2) Test Test Name 4704B Trimethoprim, Blood 4704U Trimethoprim, Urine