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 (2) Serum or Plasma (2) (-) Urine (1) Test Area Drugs of Abuse (1) (-) Therapeutics (1) Test Category Sedative/Hypnotics (1) Test Sub-Category (-) Barbiturates (1) Benzodiazepines (2) Opiates/Opioids (16) Other (5) Tricyclic (3) Test Test Name 8633U Phenobarbital, Urine