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) Anticholinergics (1) Antihistamines (1) Antihypertensives (1) Antimicrobials (1) Antipsychotics (2) (-) Depressants (1) Hypoglycemic Agents (1) Test Sub-Category Opiates/Opioids (4) Test Test Name 2276SP Heroin Metabolites - Free (Unconjugated), Serum/Plasma 2340SP Hydrocodone - Free (Unconjugated), Serum/Plasma 8663SP Hydrocodone and Metabolites - Free (Unconjugated), Serum/Plasma 8664SP Hydromorphone - Free (Unconjugated), Serum/Plasma