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) (3) Sample Type (-) Blood (3) Serum or Plasma (3) Test Area Therapeutics (3) Test Category Anesthetics (4) Antianxiety (2) (-) Antidiarrheals (1) Antiepileptics/Antiseizures (5) Antihistamines (3) Antihypertensives (1) Antimicrobials (2) Antipsychotics (3) Hallucinogens (4) (-) Immunosuppressants (2) Laxatives (1) Metals/Elements (5) Mood Stabilizers (2) Pesticides/Insecticides (1) Stimulants (2) Test Sub-Category Other (3) Test Test Name 2531B Leflunomide as Metabolite (Therapeutic Drug Monitoring), Blood 2532B Leflunomide as Metabolite (Pre-Pregnancy Monitoring), Blood 2533B Loperamide and Metabolite, Blood