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) (1) Sample Type Serum or Plasma (2) (-) Urine (1) Test Area Exposure (1) Test Category Analgesics (3) Anesthetics (1) Antianxiety (1) Anticholinergics (3) Antidepressants (1) Antiepileptics/Antiseizures (1) Antihypertensives (1) Antimicrobials (1) Benzodiazepines (1) Diuretics (1) NPS/Designer Drugs (6) (-) Pesticides/Insecticides (1) Potassium Channel Blockers (1) Psychoactives (1) Stimulants (3) Volatiles (1) Test Sub-Category Avicides (1) Test Test Name 0276U 4-Aminopyridine Exposure, Urine