I have been on anathioprine for over two years now. It has helped tremendously and I have no side effects. The only thing I noticed is that I tan a little more easily during the summer time. I am brown to begin with so it's no biggie. My GI doc who works at one of the biggest teaching hospitals in the country says they have about
2,000 patients taking azathioprine or 6MP and he is unaware of them having any real negative side effects. He recommends sunscreen for his patients who do take it and even for those that don't take it.
MyUC