Test Catalog Search Home Test Catalog Search Testing Choices: From the standard to the extraordinary × Search Clear Filter by: Clear all Method(s) Enzyme Immunoassay (EIA) (1) (-) Gas Chromatography/Mass Spectrometry (GC/MS) (1) Headspace Gas Chromatography (GC) (4) High Performance Liquid Chromatography/ Tandem Mass Spectrometry (LC-MS/MS) (3) Sample Type Blood (3) Fluid (1) Serum or Plasma (3) (-) Urine (1) Test Area Drugs of Abuse (1) Test Category (-) Depressants (1) Drugs of Abuse (2) Drugs of Abuse, Therapeutics (1) Sedative/Hypnotics (8) Therapeutics (1) Test Sub-Category Other (1) Test Test Name 9326U Gamma-Hydroxybutyric Acid Screen, Urine