I don't know what the risks are because I've never taken any of those medications but I have heard many patients and doctors prefer them over the older medications like 6mp and imuran. I have also seen a lot of positive feedback from people who are using remicade and humira here.
The thing that scares me about
these medications is that they don't seem to help for an extended period of time in many. There are a few people here who have been using remicade for 5 years but I don't think I've seen anyone using it much longer than that. Are the longterm effects really known? Is it just a bandaid short-term solution or is there a possibility it could help you for many years? These are reasons I opted for 6mp over biologics even though I have heard a lot of good things about
biologics.
Sorry I can't offer too much info. Hopefully someone who is taking them can offer input on the risks.
There are some alternative therapies, there is a resources thread with some medical options on the top of the forum.