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 Acids (3) Antidepressants (5) Antiepileptics/Antiseizures (9) Antihistamines (2) Antimicrobials (3) Antineoplastics (2) Antipsychotics (8) Antirheumatics (2) Biomarkers (3) Bronchodilators (3) Cholinesterase Inhibitors (2) Depressants (2) Diuretics (2) Immunosuppressants (5) Metals/Elements (2) (-) Muscle Relaxants (2) Other (2) Solvents (5) Terpenes (3) Vasodilators (2) Volatiles (4) Test Sub-Category (-) Other (2) Test Test Name 4487B Tizanidine, Blood 4487SP Tizanidine, Serum/Plasma