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) High Performance Liquid Chromatography/ Tandem Mass Spectrometry (LC-MS/MS) (4) Sample Type Blood (1) Fluid (1) Serum or Plasma (1) (-) Urine (1) Test Area Drugs of Abuse (1) Test Category Analgesics (1) (-) Depressants (1) Test Sub-Category Other (1) Test Test Name 9326U Gamma-Hydroxybutyric Acid Screen, Urine