Test Catalog Search Home Test Catalog Search Testing Choices: From the standard to the extraordinary × Search Clear Filter by: Clear all Method(s) (-) Gas Chromatography (GC) (1) Gas Chromatography/Mass Spectrometry (GC/MS) (1) High Performance Liquid Chromatography/ Tandem Mass Spectrometry (LC-MS/MS) (20) Sample Type Urine (1) Test Area Therapeutics (1) Test Category Acids (3) Alcohols (3) (-) Analgesics (1) Anesthetics (4) Antidepressants (9) Antiepileptics/Antiseizures (3) Antihistamines (2) Antihypertensives (5) Antimicrobials (2) Antiparkinsons (3) Antipsychotics (6) Cholinesterase Inhibitors (3) Depressants (2) Other (1) Sedative/Hypnotics (1) Solvents (4) Terpenes (3) Volatiles (5) Test Sub-Category Opiates/Opioids (1) Test Test Name 4303U Talwin® Nx, Urine