Test Catalog Search Home Test Catalog Search Testing Choices: From the standard to the extraordinary × Search Clear Filter by: Clear all Method(s) Gas Chromatography/Mass Spectrometry (GC/MS) (1) Sample Type Blood (1) Serum or Plasma (1) (-) Urine (1) Test Area Drugs of Abuse (1) Newborn Tox (1) (-) Therapeutics (1) Test Category Analgesics (15) Antianxiety (2) Antidepressants (4) (-) Sedative/Hypnotics (1) Stimulants (1) Test Sub-Category Barbiturates (1) Test Test Name 8633U Phenobarbital, Urine