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) (1) High Performance Liquid Chromatography/ Tandem Mass Spectrometry (LC-MS/MS) (2) Sample Type Blood (3) Meconium (2) (-) Serum or Plasma (3) Urine (3) Test Area Therapeutics (3) Test Category (-) Analgesics (3) NPS/Designer Drugs (1) Test Sub-Category Anticoagulants (2) (-) Opiates/Opioids (3) Test Test Name 0801SP Buprenorphine and Metabolite - Free (Unconjugated), Serum/Plasma 0802SP Buprenorphine and Metabolite - Free (Unconjugated) Screen, Serum/Plasma 0885SP Butorphanol - Free (Unconjugated), Serum/Plasma