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 (1) Analgesics (19) Antianxiety (4) Antiarrhythmics (2) Antidepressants (6) Antidiabetics (4) Antiepileptics/Antiseizures (16) Antihistamines (2) Antihypertensives (10) Antimicrobials (5) Antipsychotics (10) Antispasmodics (2) Appetite Suppressants (2) Decongestants (3) Herbicides (2) Immunosuppressants (2) NPS/Designer Drugs (7) (-) Opiate/Opioid Antagonists (4) Other (1) Perfluorinated Compounds (4) Pesticides/Insecticides (1) Sedative/Hypnotics (4) Stimulants (6) 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