Test Catalog Search Home Test Catalog Search Testing Choices: From the standard to the extraordinary × Search Clear Filter by: Clear all Method(s) Enzymatic Assay (EZA) (1) Gas Chromatography/Mass Spectrometry (GC/MS) (1) Sample Type (-) Blood (1) Fluid (1) Serum or Plasma (1) (-) Urine (1) Test Area Diagnostic Aids (2) Test Category Alcohols (3) Analgesics (6) Anesthetics (3) Antianxiety (2) Antiarrhythmics (2) Anticholinergics (4) Antidepressants (4) Antiepileptics/Antiseizures (1) Antihistamines (3) Antithrombotics (1) Antitussives/Cough Suppressants (2) Benzodiazepines (2) (-) Biomarkers (2) Depressants (4) Diuretics (1) Electrolytes (1) Metals/Elements (10) Muscle Relaxants (2) NPS/Designer Drugs (4) Plasticizers (1) Sedative/Hypnotics (10) Stimulants (2) Volatiles (5) Test Sub-Category Small Molecule (2) Test Test Name 0420B Betahydroxybutyric Acid, Blood 0642U Betahydroxybutyric Acid, Urine