Test Catalog Search Home Test Catalog Search Testing Choices: From the standard to the extraordinary × Search Clear Filter by: Clear all Method(s) High Performance Liquid Chromatography/ Tandem Mass Spectrometry (LC-MS/MS) (2) High Performance Liquid Chromatography/Time of Flight-Mass Spectrometry (LC/TOF-MS) (1) Sample Type Blood (5) (-) Serum or Plasma (3) Urine (4) Test Area Drugs of Abuse (1) Therapeutics (2) Test Category Antidepressants (1) Antidiabetics (1) Industrial/Environmental Toxins (1) (-) NPS/Designer Drugs (1) (-) Opiate/Opioid Antagonists (2) Other (1) Stimulants (2) Therapeutics (1) Vasodilators (1) Test Sub-Category (-) Other (3) Stimulants (1) Synthetic Cathinone (1) Test Test Name 3111SP Naloxone - Free (Unconjugated), Serum/Plasma 3116SP Naltrexone and Metabolite - Free (Unconjugated), Serum/Plasma 8756SP Novel Psychoactive Substances (NPS) Screen 1, Serum/Plasma