Everything that Patricia56 said in the post above mirrors what the doctor said to me at Mayo Clinic yesterday.
I'm going through a similar thing. Right now just on Pentasa, Entocort failed, and the only thing that makes me function is prednisone. The doctor at Mayo said that all studies indicated that the best shot at inducing and maintaining remission involves combo treatment of a 6mp and an anti-TNF (Humira, Remicade, etc). I'm really scared too. But I feel that I have to try it. My quality of life is so poor right now, and that characterization is generous. But he gave me some statistics. For example, the cancer risks....If you fill Yankee stadium every day for a year, 10 people that have entered the stadium will end up with the cancer. Now, if you put all of the people entering the stadium on these drugs, the number increases from 10 to 30. There is an increase, but if you think of the numbers, the thousands and thousands of people to fill the stadium every day, and if no one is on the drugs, 10 people will end up with the cancer anyway, and if everyone is on the drugs, then 30 people will end up with the cancer...I guess it boils down to whether or not your quality of life is good enough right now to make a go of it.
I've held off for a long time hoping for a change. Just finished a course of pred July 7, pooping blood today, joint pain, eye issues, inflammation everywhere, mouth sores etc. So fatigued my movements give me a visual image that I am trying to move through water. I can't do it anymore. And I am scared, and right now more thinking aloud than anything else, but would I take 10 years off the end of my life to live better now? Yes. Absolutely. I'm 25. Those last 10 years would probably be miserable anyway....diapers, height of CD, deteriorating health. Right now, I am eloping in October to Tahiti with the love of my life (we have been together for 11.5 years) and we want to have kids. I want to have the energy to get a better job so I don't have to work two jobs just to pay my medical bills, you know? And that just drains me and further exasperates my health issues.
I guess that is just me though. I'm scared to death (I have panic disorder, so increasing my odds of these bad things is no good for me mentally) but looking at the long run, I think it is the best thing I can do for myself.