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 (2) Analgesics (10) Anesthetics (6) Antidepressants (8) Antidiabetics (2) Antiepileptics/Antiseizures (6) Antihistamines (2) Antihypertensives (6) Antimicrobials (2) Antineoplastics (2) Antiparkinsons (2) Antipsychotics (12) (-) Antirheumatics (2) Biomarkers (4) Bronchodilators (3) Cholinesterase Inhibitors (2) Depressants (2) Diuretics (2) Immunosuppressants (5) Metals/Elements (12) Muscle Relaxants (2) Sedative/Hypnotics (5) Solvents (3) Stimulants (2) Sympathomimetic Amines (2) Terpenes (1) Vasodilators (2) Volatiles (5) Test Sub-Category Other (2) Test Test Name 4489B Tofacitinib, Blood 4489SP Tofacitinib, Serum/Plasma