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/Mass Spectrometry (GC/MS) (1) High Performance Liquid Chromatography/ Tandem Mass Spectrometry (LC-MS/MS) (1) Sample Type Blood (2) (-) Serum or Plasma (1) Test Area Therapeutics (1) Test Category Analgesics (3) Antiarrhythmics (1) Anticholinergics (1) Antidepressants (3) Antiepileptics/Antiseizures (2) (-) Antihistamines (1) Antineoplastics (1) Herbicides (1) Muscle Relaxants (1) Pesticides/Insecticides (2) Sedative/Hypnotics (1) Vasodilators (1) Volatiles (3) Test Sub-Category Other (1) Test Test Name 3740SP Phenyltoloxamine, Serum/Plasma