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 (-) Blood (1) Serum or Plasma (1) Urine (1) Test Area (-) Therapeutics (1) Test Category Sedative/Hypnotics (1) Test Sub-Category Barbiturates (13) Benzodiazepines (21) (-) Hormones (1) Non-Benzodiazepines (3) Other (17) Phenothiazines (1) Test Test Name 2604B Melatonin, Blood