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 Therapeutics (1) Test Category Antidepressants (5) Antiepileptics/Antiseizures (5) Antihypertensives (2) Antimicrobials (2) Metals/Elements (2) (-) Other (1) Vasodilators (1) Volatiles (1) Test Sub-Category Other (1) Test Test Name 4780SP Vitamin B3 (Niacin and Metabolites), Serum/Plasma