Test Catalog Search Home Test Catalog Search Testing Choices: From the standard to the extraordinary × Search Clear Filter by: Clear all Method(s) Enzyme-Linked Immunosorbent Assay (ELISA) (2) (-) High Performance Liquid Chromatography/ Tandem Mass Spectrometry (LC-MS/MS) (4) Sample Type (-) Blood (4) Fluid (3) Serum or Plasma (4) Tissue (2) Urine (3) Test Area Drugs of Abuse (1) Therapeutics (3) Test Category Analgesics (3) Depressants (1) Test Sub-Category Antimalarials (1) Diuretics (1) (-) Opiates/Opioids (4) Other (5) Test Test Name 2276B Heroin Metabolites - Free (Unconjugated), Blood 2340B Hydrocodone - Free (Unconjugated), Blood 8663B Hydrocodone and Metabolites - Free (Unconjugated), Blood 8664B Hydromorphone - Free (Unconjugated), Blood