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) (4) Sample Type (-) Blood (2) (-) Serum or Plasma (2) Urine (3) Test Area Therapeutics (4) Test Category Alcohols (2) Analgesics (3) Anesthetics (1) Antiarrhythmics (5) Anticholinergics (2) Antidepressants (2) Antidiabetics (4) Antiepileptics/Antiseizures (11) Antihistamines (5) Antineoplastics (2) Antipsychotics (8) Appetite Suppressants (2) Chemicals (1) Hallucinogens (2) Herbicides (3) Immunosuppressants (2) Industrial/Environmental Toxins (2) Metals/Elements (2) Muscle Relaxants (2) NPS/Designer Drugs (1) (-) Opiate/Opioid Antagonists (4) Other (2) Perfluorinated Compounds (4) Pesticides/Insecticides (2) Stimulants (4) Terpenes (1) Therapeutics (1) Vasodilators (4) Volatiles (8) Test Sub-Category (-) Other (4) Test Test Name 3111B Naloxone - Free (Unconjugated), Blood 3111SP Naloxone - Free (Unconjugated), Serum/Plasma 3116B Naltrexone and Metabolite - Free (Unconjugated), Blood 3116SP Naltrexone and Metabolite - Free (Unconjugated), Serum/Plasma