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) (4) Sample Type Blood (2) Serum or Plasma (3) Tissue (1) (-) Urine (4) Test Area (-) Therapeutics (4) Test Category Analgesics (1) Antianxiety (3) Anticholinergics (1) Antidepressants (4) Antihistamines (2) Antihypertensives (1) (-) Antitussives/Cough Suppressants (4) Potassium Channel Blockers (1) Stimulants (1) Test Sub-Category Other (4) Test Test Name 2915U Dextro / Levo Methorphan - Total, Urine 2917U Dextromethorphan and Metabolite Ratio - Total, Urine 9205U Dextro / Levo Methorphan Screen - Total, Urine 9206U Dextrorphan / Levorphanol Screen - Total, Urine