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 (-) Blood (1) (-) Serum or Plasma (1) Urine (1) Test Area (-) Therapeutics (2) Test Category Sedative/Hypnotics (2) Test Sub-Category Barbiturates (25) Benzodiazepines (35) (-) Hormones (2) Non-Benzodiazepines (4) Other (30) Phenothiazines (2) Test Test Name 2604B Melatonin, Blood 2604SP Melatonin, Serum/Plasma