5 - 11 days
6 Mercaptopurine (6 MP)
Mercaptopurine (6-MP) Level
Looking to order a test?
We’ve provided helpful links to make ordering easy.Find a Requisition
All specimens should be accompanied by a requisition.Submitting Specimens
Learn about how to properly label and where to ship specimens.Order Kits and Supplies
MLabs provides all the supplies necessary for the collection of specimens.Test FAQ
Visit our provider FAQ and learn about common questions to ordering tests.
High Performance Liquid Chromatography (HPLC)
Therapeutic drug monitoring of Mercaptopurine (6-MP) (Purinethol) or Azathioprine (Imuran) (measured as 6-Mercaptopurine).
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.
* Reference ranges may change over time. Please refer to the original patient report when evaluating results.