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 (16) Anesthetics (8) Antianxiety (2) Antiarrhythmics (4) Anticholinergics (6) Antidepressants (25) Antiemetics (1) Antiepileptics/Antiseizures (6) Antihistamines (3) Antihypertensives (2) Antimicrobials (1) Antipsychotics (10) Antitussives/Cough Suppressants (3) Decongestants (4) Depressants (5) (-) Diagnostic Aids (2) Muscle Relaxants (1) Sedative/Hypnotics (11) Stimulants (2) Vasodilators (1) Test Sub-Category Other (2) Test Test Name 9249B Pseudoephedrine vs Ephedrine Differentiation Screen, Blood 9249U Pseudoephedrine vs Ephedrine Differentiation Screen, Urine