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) (15) Sample Type Urine (1) Test Area Therapeutics (1) Test Category Acids (3) Alcohols (3) (-) Analgesics (1) Antidepressants (4) Antiepileptics/Antiseizures (3) Antipsychotics (3) Cholinesterase Inhibitors (3) Solvents (4) Terpenes (1) Volatiles (4) Test Sub-Category (-) Opiates/Opioids (1) Test Test Name 4303U Talwin® Nx, Urine