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) (2) Sample Type Blood (3) Fluid (1) Serum or Plasma (4) (-) Tissue (2) Urine (5) Test Area Therapeutics (2) Test Category Antiarrhythmics (1) (-) Antihistamines (1) (-) Antitussives/Cough Suppressants (1) Drugs of Abuse (2) Drugs of Abuse, Therapeutics (1) Test Sub-Category Other (2) Test Test Name 1760TI Diphenhydramine, Tissue 2915TI Dextro/Levo Methorphan, Tissue