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) (2) Sample Type Blood (1) Serum or Plasma (1) Test Area Therapeutics (2) Test Category Analgesics (6) Anesthetics (3) Antiarrhythmics (4) Anticholinergics (3) Antidepressants (6) Antidiabetics (4) Antiepileptics/Antiseizures (20) Antimigraines (3) Antineoplastics (2) Antipsychotics (17) Antirheumatics (2) Bronchodilators (3) Cholinesterase Inhibitors (2) Diuretics (4) Hallucinogens (3) Hypoglycemic Agents (2) Immunosuppressants (7) (-) Muscle Relaxants (2) Opiates/Opioids (3) Other (2) Pesticides/Insecticides (5) Sedative/Hypnotics (9) Vasodilators (7) Volatiles (2) Test Sub-Category (-) Other (2) Test Test Name 4487B Tizanidine, Blood 4487SP Tizanidine, Serum/Plasma