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 (1) (-) Urine (1) Test Area Therapeutics (1) Test Category Antimicrobials (1) Test Sub-Category Alkaloids (1) (-) Antibiotics (1) Anticholinergics (1) Benzodiazepines (1) Opiates/Opioids (3) Other (4) Toxic Elements (5) Tricyclic (1) Vasoconstrictors (1) Test Test Name 4704U Trimethoprim, Urine