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 Serum or Plasma (1) Test Area Exposure (3) (-) Therapeutics (1) Test Category Analgesics (4) Anesthetics (3) Antiarrhythmics (4) Anticholinergics (3) Antidepressants (10) Antidiabetics (4) Antiepileptics/Antiseizures (23) Antihistamines (2) Antimigraines (3) Antineoplastics (2) Antiparkinsons (1) Antipsychotics (20) Antirheumatics (2) Bronchodilators (3) Cholinesterase Inhibitors (5) Diuretics (4) Hypoglycemic Agents (2) Immunosuppressants (7) Muscle Relaxants (2) (-) Other (1) Sedative/Hypnotics (12) Vasodilators (7) Test Sub-Category (-) Other (1) Test Test Name 4780SP Vitamin B3 (Niacin and Metabolites), Serum/Plasma