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) Fluid (1) Serum or Plasma (2) (-) Urine (1) Test Area Drugs of Abuse (1) Test Category Alcohols (1) (-) Depressants (1) Drugs of Abuse (14) Drugs of Abuse, Therapeutics (5) Sedative/Hypnotics (13) Therapeutics (6) Volatiles (3) Test Sub-Category Alcohols (5) Benzodiazepines (6) (-) Other (1) Test Test Name 9326U Gamma-Hydroxybutyric Acid Screen, Urine