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 (4) (-) Serum or Plasma (4) Urine (4) Test Area Therapeutics (4) Test Category Analgesics (4) Antianxiety (1) Antidepressants (2) Antidiabetics (1) Antihypertensives (2) Industrial/Environmental Toxins (1) Metals/Elements (1) NPS/Designer Drugs (3) (-) Opiate/Opioid Antagonists (2) Other (1) (-) Sedative/Hypnotics (2) Stimulants (2) Therapeutics (1) Vasodilators (1) Test Sub-Category Benzodiazepines (2) Other (2) Test Test Name 3111SP Naloxone - Free (Unconjugated), Serum/Plasma 3116SP Naltrexone and Metabolite - Free (Unconjugated), Serum/Plasma 3175SP Nitrazepam and Metabolite, Serum/Plasma 9215SP Nitrazepam and Metabolite Screen, Serum/Plasma