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 Analgesics (5) Antiarrhythmics (6) Anticholinergics (3) Antidepressants (8) Antiemetics (1) Antihistamines (5) Antihypertensives (5) Antithrombotics (2) Antitussives/Cough Suppressants (10) Cholinesterase Inhibitors (3) Diuretics (3) Muscle Relaxants (1) (-) Potassium Channel Blockers (2) Vasodilators (2) Test Sub-Category Other (2) Test Test Name 0275SP Dalfampridine, Serum/Plasma 0275U Dalfampridine, Urine