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 Benzodiazepines (1) (-) Hormones (1) Other (6) Serotonin-Norepinephrine Reuptake Inhibitors (SNRI) (1) Tetracyclics (2) Test Test Name 2604U Melatonin, Urine