Test Catalog Search Home Test Catalog Search Testing Choices: From the standard to the extraordinary × Search Clear Filter by: Clear all Method(s) Headspace Gas Chromatography (GC) (2) (-) High Performance Liquid Chromatography/ Tandem Mass Spectrometry (LC-MS/MS) (2) Sample Type Blood (1) Urine (1) Test Area Therapeutics (2) Test Category Anticholinergics (3) Antidepressants (4) Antipsychotics (2) Antitussives/Cough Suppressants (3) Depressants (4) (-) Diagnostic Aids (2) Diuretics (1) Drugs of Abuse (3) Muscle Relaxants (3) Other (1) Sedative/Hypnotics (3) Stimulants (4) Volatiles (1) Test Sub-Category (-) Other (2) Test Test Name 9249B Pseudoephedrine vs Ephedrine Differentiation Screen, Blood 9249U Pseudoephedrine vs Ephedrine Differentiation Screen, Urine