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 (3) Fluid (1) Serum or Plasma (2) (-) Urine (1) Test Area Drugs of Abuse (1) Test Category Alcohols (1) (-) Depressants (1) Drugs of Abuse (11) Drugs of Abuse, Therapeutics (4) Sedative/Hypnotics (10) Therapeutics (3) Volatiles (1) Test Sub-Category Alcohols (3) Benzodiazepines (4) (-) Other (1) Test Test Name 9326U Gamma-Hydroxybutyric Acid Screen, Urine