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) High Performance Liquid Chromatography/ Tandem Mass Spectrometry (LC-MS/MS) (5) Sample Type Blood (1) (-) Urine (1) Test Area Therapeutics (1) Test Category Acids (1) Alcohols (1) (-) Analgesics (1) Antidepressants (1) Antiepileptics/Antiseizures (1) Antihypertensives (1) Antiparkinsons (1) Antipsychotics (2) Cholinesterase Inhibitors (1) Sedative/Hypnotics (1) Solvents (2) Terpenes (1) Volatiles (1) Test Sub-Category Opiates/Opioids (1) Test Test Name 4303U Talwin® Nx, Urine