Test Catalog Search Home Test Catalog Search Testing Choices: From the standard to the extraordinary × Search Clear Filter by: Clear all Method(s) Gas Chromatography (GC) (1) (-) High Performance Liquid Chromatography/ Tandem Mass Spectrometry (LC-MS/MS) (5) Sample Type Blood (3) Fluid (1) Serum or Plasma (4) Tissue (2) (-) Urine (5) Test Area Therapeutics (5) Test Category Analgesics (1) Anticholinergics (1) Antidepressants (2) (-) Antihistamines (1) Antihypertensives (1) (-) Antitussives/Cough Suppressants (4) Diuretics (1) NPS/Designer Drugs (3) Potassium Channel Blockers (1) Test Sub-Category Other (5) Test Test Name 1760U Diphenhydramine, Urine 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