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) (5) Sample Type Blood (7) Fluid (1) Serum or Plasma (7) (-) Urine (5) Test Area (-) Therapeutics (5) Test Category Analgesics (9) Antacids (1) Antianxiety (2) Antiarrhythmics (1) Anticholinergics (1) Antidepressants (6) Antiepileptics/Antiseizures (3) Antihistamines (1) (-) Antihypertensives (2) Antipsychotics (1) Antispasmodics (1) Appetite Suppressants (1) Decongestants (1) Immunosuppressants (1) Muscle Relaxants (1) (-) Opiate/Opioid Antagonists (3) Sedative/Hypnotics (3) Stimulants (1) Test Sub-Category Beta Blockers (2) Other (3) Test Test Name 3043U Metoprolol, Urine 3103U Nadolol, Urine 3111U Naloxone - Total (Conjugated/Unconjugated), Urine 3113U Naloxone - Total (Conjugated/Unconjugated) Screen, Urine 3116U Naltrexone and Metabolite - Total (Conjugated/Unconjugated), Urine