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) (16) (-) Spectrophotometry (SP) (1) Sample Type Serum or Plasma (1) Urine (1) Test Area Therapeutics (2) Test Category Analgesics (1) Antimicrobials (1) Test Sub-Category (-) Antibiotics (1) Anticholinergics (3) Antiparasitics (2) Barbiturates (3) Calcium Channel Blockers (5) Non-Barbiturate Sedative Hypnotics (2) (-) Opiates/Opioids (1) Organochlorides (1) Other (35) Phenothiazines (3) Sedative-Hypnotics (2) Tricyclic (5) Test Test Name 4245SP Sulfonamides, Undifferentiated, Serum/Plasma 4303U Talwin® Nx, Urine