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) (2) (-) High Performance Liquid Chromatography/ Tandem Mass Spectrometry (LC-MS/MS) (2) Sample Type Blood (2) (-) Serum or Plasma (2) Test Area Therapeutics (2) Test Category Antidepressants (1) Antiepileptics/Antiseizures (2) Antihistamines (1) Antineoplastics (1) (-) Antipsychotics (1) Antirheumatics (1) Bronchodilators (1) Cholinesterase Inhibitors (1) Diuretics (1) Immunosuppressants (2) (-) Muscle Relaxants (1) Vasodilators (1) Test Sub-Category (-) Other (2) Test Test Name 4487SP Tizanidine, Serum/Plasma 4660SP Trifluoperazine, Serum/Plasma