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) Urine (1) Test Area (-) Therapeutics (2) Test Category Analgesics (5) Antiarrhythmics (2) Anticholinergics (3) Antidiabetics (2) Antiepileptics/Antiseizures (12) Antihistamines (7) Antipsychotics (7) Appetite Suppressants (3) Cholinesterase Inhibitors (3) (-) Diagnostic Aids (2) Vasodilators (3) Test Sub-Category (-) Other (2) Test Test Name 9249B Pseudoephedrine vs Ephedrine Differentiation Screen, Blood 9249U Pseudoephedrine vs Ephedrine Differentiation Screen, Urine