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 (4) Anesthetics (3) Antiarrhythmics (4) Anticholinergics (3) Antidepressants (10) Antidiabetics (4) Antiepileptics/Antiseizures (23) Antihistamines (2) Antimigraines (3) Antineoplastics (2) Antiparkinsons (1) Antipsychotics (20) Antirheumatics (2) Bronchodilators (3) Cholinesterase Inhibitors (5) Diuretics (4) Hypoglycemic Agents (2) Immunosuppressants (7) (-) Muscle Relaxants (2) Other (1) Sedative/Hypnotics (12) Vasodilators (7) Test Sub-Category (-) Other (2) Test Test Name 4487B Tizanidine, Blood 4487SP Tizanidine, Serum/Plasma