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) (2) Sample Type Serum or Plasma (1) Urine (1) Test Area Therapeutics (2) Test Category Antiarrhythmics (2) Anticholinergics (3) Antihistamines (5) Antitussives/Cough Suppressants (10) Cholinesterase Inhibitors (3) Diuretics (4) Drugs of Abuse (2) (-) Potassium Channel Blockers (2) Solvents (1) Test Sub-Category NSAIDs (2) Opiates/Opioids (3) (-) Other (2) Test Test Name 0275SP Dalfampridine, Serum/Plasma 0275U Dalfampridine, Urine