Mercaptopurine (6-MP, Purinethol)
Mercaptopurine may be administered as an antineoplastic or may be present as a metabolite of the immunosuppressant drug azathioprine. Therapeutic and toxic ranges have not been established. Usual therapeutic doses of either mercaptopurine or azathioprine produce 6-mercaptopurine serum concentrations of less than 1000 ng/mL.
Test Performed By: Medtox Laboratories, Inc.
402 W. County Road D
St. Paul, MN 55112