Azathioprine is used to prevent rejection of transplanted organs and for cases of severe arthritis that do not respond to other therapies. OTHER USES: This medication may also be used to treat ulcerative colitis and for other purposes as determined by your doctor.

This medication alters the body's immune system so that your body does not reject a transplanted organ. It is also used to treat severe rheumatoid arthritis after other treatments have failed to provide relief.

This drug is used to treat or prevent certain skin conditions related to Hansen's disease (leprosy). OTHER USES: This drug may also be used for certain conditions in cancer or HIV disease, and other diseases (such as rheumatoid arthritis).

This drug is used to treat multiple sclerosis (MS) and decrease the number of flare-ups of the disease. This drug is not a cure for MS.