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 Exposure (1) (-) Therapeutics (1) Test Category Antimicrobials (1) Test Sub-Category Alkaloids (1) Alpha Blockers (1) (-) Antibiotics (1) Anticholinergics (1) Barbiturates (3) Benzodiazepines (2) Beta-2 Andrenergic Agonists (1) Beta Blockers (1) Diuretics (1) NSAIDs (1) Opiates/Opioids (3) Other (17) Phenothiazines (3) Sulfonylureas (2) Tricyclic (3) Vasoconstrictors (1) Test Test Name 4704SP Trimethoprim, Serum/Plasma