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 (1) Test Area Therapeutics (1) Test Category Analgesics (4) Antidepressants (2) Antidiabetics (2) Antiepileptics/Antiseizures (2) Antihypertensives (3) Antimicrobials (1) Antineoplastics (1) Antipsychotics (1) Antirheumatics (1) Bronchodilators (2) Cholinesterase Inhibitors (1) Diuretics (1) Immunosuppressants (2) (-) Muscle Relaxants (1) Sedative/Hypnotics (2) Stimulants (1) Sympathomimetic Amines (1) Vasodilators (1) Test Sub-Category Other (1) Test Test Name 4487SP Tizanidine, Serum/Plasma