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 Stimulants (2) Test Sub-Category (-) Alkaloids (2) Alpha Blockers (1) Antibiotics (2) Benzodiazepines (3) Beta Blockers (1) Diuretics (1) NSAIDs (1) Opiates/Opioids (6) Other (17) Tricyclic (2) Vasoconstrictors (2) Test Test Name 4380B Theobromine, Blood 4380U Theobromine, Urine