How Long Does Mercaptopurine Take to Work?

Mercaptopurine works to reduce inflammation in the body by targeting the immune system. 6MP is given at a lower dose than azathioprine. It may take up to 6 months for the 6MP to start working effectively. Your doctor may want you to continue taking other medicines during this time to help manage your disease.

When is the best time to take mercaptopurine?

You can take Mercaptopurine with food or on an empty stomach but the choice of method should be consistent from day to day. You should take your medicine at least 1 hour before or 2 hours after having milk or dairy products.

How long can you stay on mercaptopurine?

Research suggests that for some people azathioprine or mercaptopurine can continue to be effective for at least five years and possibly longer.