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) (1) Sample Type (-) Blood (1) Serum or Plasma (1) Urine (1) Test Area Therapeutics (1) Test Category Antidiabetics (1) Antiepileptics/Antiseizures (1) Antihypertensives (1) Antimicrobials (1) Cholinesterase Inhibitors (1) Depressants (2) Diagnostic Aids (1) (-) Expectorants (1) Metals/Elements (2) Sedative/Hypnotics (2) Solvents (2) Test Sub-Category Other (1) Test Test Name 2185B Guaifenesin, Blood