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) (2) (-) Gas Chromatography/Mass Spectrometry (GC/MS) (2) Sample Type Blood (1) Fluid (1) Test Area Diagnostic Aids (2) Test Category Analgesics (8) Anesthetics (6) Antianxiety (3) Antiarrhythmics (3) Anticholinergics (7) Antidepressants (9) Antiepileptics/Antiseizures (2) Antineoplastics (1) Antipsychotics (1) Antithrombotics (3) Benzodiazepines (3) (-) Biomarkers (2) Depressants (6) Diuretics (2) Drugs of Abuse (2) Muscle Relaxants (4) NPS/Designer Drugs (6) Plasticizers (2) Sedative/Hypnotics (12) Stimulants (3) Volatiles (1) Test Sub-Category Small Molecule (2) Test Test Name 0420B Betahydroxybutyric Acid, Blood 0420FL Betahydroxybutyric Acid, Fluid