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) (1) Sample Type Blood (1) Serum or Plasma (2) (-) Urine (1) Test Area Drugs of Abuse (2) (-) Therapeutics (1) Test Category Analgesics (1) Test Sub-Category Alkaloids (2) Antipyretics (2) Antivirals (2) Barbiturates (2) Benzodiazepines (1) Beta Blockers (1) Carbonic Anhydrase Inhibitors (1) (-) Opiates/Opioids (1) Other (4) Phenothiazines (1) Serotonin-Norepinephrine Reuptake Inhibitors (SNRI) (1) Tricyclic (2) Test Test Name 9103U Alfentanil Screen, Urine