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 (-) Serum or Plasma (1) Test Area Therapeutics (1) Test Category Alcohol Deterrents (1) Anesthetics (1) Antianxiety (1) Antiarrhythmics (2) Anticholinergics (1) Anticoagulants (1) Antidepressants (1) Antiepileptics/Antiseizures (5) Antipsychotics (3) Diuretics (1) (-) Immunosuppressants (1) Potassium Channel Blockers (1) Stimulants (1) Test Sub-Category (-) Other (1) Test Test Name 0649SP Methotrexate, Serum/Plasma