Test Catalog Search Home Test Catalog Search Testing Choices: From the standard to the extraordinary × Search Clear Filter by: Clear all Method(s) Colorimetry (C) (1) High Performance Liquid Chromatography/ Tandem Mass Spectrometry (LC-MS/MS) (4) Sample Type (-) Blood (5) Serum or Plasma (5) Urine (4) Test Area Exposure (1) Therapeutics (5) Test Category Analgesics (3) Anesthetics (1) Antianxiety (1) Antidepressants (4) Antidiabetics (1) Antihypertensives (2) Industrial/Environmental Toxins (1) Metals/Elements (1) NPS/Designer Drugs (5) (-) Opiate/Opioid Antagonists (2) (-) Sedative/Hypnotics (2) Stimulants (2) (-) Vasodilators (1) Test Sub-Category Benzodiazepines (2) Other (3) Test Test Name 3111B Naloxone - Free (Unconjugated), Blood 3116B Naltrexone and Metabolite - Free (Unconjugated), Blood 3174B Nitrate/Nitrite (Qualitative), Blood (Forensic) 3175B Nitrazepam and Metabolite, Blood 9215B Nitrazepam and Metabolite Screen, Blood