IBD Medication Guide

Azathioprine (6-MP)

Azathioprine (6-MP)

Brand Name(s)

Azasan®, Imuran®

Drug Class


How taken

Oral, not given by intravenous (IV) for IBD

Used for

Crohn's disease and ulcerative colitis

Recommendations for Pregnancy

Can cause fetal harm

Recommendations for Lactation

Use of Azasan® in nursing mothers not recommended

Medication indication

Talk to your doctor about the potential risks and side effects for use of these medications in Crohn's disease or ulcerative colitis.

Indicated for pediatric use


NOTE: This medication may be recommended for pediatric use. Be sure to talk to your doctor about potential risks and side effects.

Most common side effects

Common side effects may include headache, nausea, vomiting, diarrhea, malaise, canker sores, rash, fever, pain in joints.


Periodic blood work is necessary when taking Imuran® to monitor the liver and blood counts. Infections, including lymphoma and pancreatitis, have been rarely reported.

Learn more about immunomodulators

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